As an old kat/SR player (still my main toon after 6 years :P) I can't resist but to look at this.
A few pointers that some of old forum posters pointed to me when I was building my kat/SR.
Purple set in gamblers cut is better than purple set in Soaring Dragon. This is becuase your main attack chain would be something like GC-SD-GC-GD and on a dps base gamblers cut gets more value from purple set.
I assume stealth is more like a personal choice since you don't actually need it to put LoTG +recharge you could easily put it somewhere else.
Your damage is lacking in more than one area. Get muscularate instead of spiritual and try to five slot performance shifters in both physical perfection and stamina. Also I suggest getting assault but you need to remove steath for that. Another choice for getting damage buff is slotting red fortune but it requires 4 slotting (5 slotting if you want extra recharge)
Endurance reductions in weave and tough are not necessary they don't use that much endurance to begin with and if you five slot performance shifters into stamina and physical perfection it will be better. While at it move miracle +recovery to physical perfection and put a numina heal into health to get more regen.
Unless you are planing to do solo incarnate content you don't need to take elude. If you are going to do solo incarnate content however I suggest also taking either barrier or rebirth destiny incarnate powers and using them just before your elude crash.
Quickness does not need 3 speed boost just one is enough.
This is what I got from what you have it may still need some damage buff but I tried to not remove any of your power choices and not change your sloting much.
Code:
Another note is if you are going to use enhancement boosters? If you do +5's in all defense powers and in hasten you can remove one slot from hasten and hami from weave and still keep your perma hasten and soft cap and one lucky away from incarnate softcap build. You can put those extra slots to either tough or health to get a little more survivalbility too. If nothing else I suggest making purples +5's when you can they increase dps good.| Copy & Paste this data into Mids' Hero Designer to view the build | |-------------------------------------------------------------------| |MxDz;1551;718;1436;HEX;| |78DA6594DB4E13511486F7B4539042A1A59483D0839C5A8A545013E391445103A55| |029E095C1A1DDC0C471DA4C8BA1973E803101D41750D41BDFC1D7D067F070EFA1AE| |99F5532A9D40BE3DFFFAD79EB5D6EC69666FAEE3D3FDE7B342E9BC6368E5F2462E6| |F69A592B4BCAB32BF63168DE27655D0D5BBAE5B955DCD883DD42C4B2F5A314B3ED5| |9EC8560A858E533632D2903295D62A9AA945EBEA9CDC926659A672BBF6DD8ADC32E| |49E2C07E6CD1D6949B3923A5EF8B2C5A291BAA76FEF547473DBEBDCE54A52163890| |91053DAF9B32E0DCCD9BCFF4B2BEA91B7AA51AB85BD2F3A9DBC5427523A3952BD2A| |AF6535993F4FFC2AECFB96A1E31E912624615DD4966CF381867F627C0CFC4A02A32| |76AEE2E4BA458FE2C43AFCCCCE00B33BC45C22AF02AF026F0CDE18BC23F02E93D70| |DAF1B5E155E15DE38BC2FC9EB41FD9EB75CDF9977E011D3FB1EFCC0ECF8C8542897| |DBAFA9AD0BAC5D48838BCC990CB8C4CC52421BE788367B80A40D93D6CEF5BADAA18| |D9EA29B3C3EF628BE3E5A84694617DD4EEC01C5BA3826BA22ECDF272D80BE02BFF8| |D9BD82FDB1DF7C7FEE0FF817AC3157283788FD8253BC9F4A5A08358630BB5ECC76F| |40AC9AA5B84C9D38779F4A539767E11CC804BCCA965E601E50C2067A0C0CF3A2BC1| |C7CC88066E32739433885A06D1EFD02946C913C6BE61D412CF3227504B12B52451C| |B21E54431B3E8559EC5F835F03A788319BFC99C98E599AE52EE306A1AEEF9FF3C8E| |E0ECE5C83A86773F86F77AE41322C1799EC41BECB9CF4C1E32A75E8307384B0B941| |05785AF95BF417BBF49E71D0831425A8A3525F50567F12B738D62D3F04FC3FFCD5B| |FFAE848277FDE34473296BFC2CD73AF7E0BAC567EF7B635E82F37E9E681E05BDB4A| |09716F4E0470F7EF41679C51C52EBBF23F4479788AAF55F875AB2293ADDA4CC3429| |979A94CB4DCA62939255F158BB334769F30BFBCB712AC97AEDC9F2FA51C35A6B586| |F36AC9D2B1DA41E21FC032EFFF50B| |-------------------------------------------------------------------|
If you are going to get scrapper ATO you can replace crushing impact on SD to put it. I suggest six slotting all in there and you can remove one slot from focused sense and one obliteration in lotus drop. (assuming you also got +5 boosters) Also purple ATO set increase your single target DPS too not to mention set itself gives %4 damage bonus.
EDIT: To let you make a comparision I will put my current build in here the empty space on SD is purple ATO. I rarely have endurance issues and its almost always because of some end drain mobs. I plan to put pvp resist +def(all) like your build to remove combat jumping and getting elude instead for solo incarnate stuff when i22 launches.
Code:
| Copy & Paste this data into Mids' Hero Designer to view the build | |-------------------------------------------------------------------| |MxDz;1504;695;1390;HEX;| |78DA65945D4F1341148667DBADA55FB46529140BB6A5404B2B2B8D5EF8154914300| |8C542D53B435618A049539AB62470E9BDA002D16BA3A2DEF81FFC397E80DE1BAD67| |F7BCD426BBE9CE33F3CE3967CE9C9D696167DAFFF9EED329A174DFA9188DC64A69B| |56ED46AB2EE5E349ADB75A322CCC74D6FE46C66A5202B52EAF346D3A81AF1B63A2D| |D765B521F5D2B6395A96EB15B9231BE1B9EAA6ACCB6A533FEB788B5B5B15BD54937| |22D607567CB1B9BCD727523688D16A4B126EB8DCD72CD7F36AED16478A6565ED56F| |6FADEDAE148C4653D677A3945396DE3DB7C0D372899C4388BC4738C6C03453CD805| |9E6F92F44CD230AA6AF62F93A84A65873E77AC13073916C14B651956ED6BC41A6DF| |0B0698DD3EE63EF9389193F32BAD35E4115DDF98DE5366DF77F007337AC21C265F1| |7AFA7B87282E382CFDDFC2DCC39F75BDE4BD71B6691263CEC273CB05748F3B1BDF0| |B5E8114E5202B00AF42BD68A4BA40551856084771045152642CC03B2097324356CE| |E8DB4DE16AF7CE137F807FC8B6A938FC6715D1A2A95408592A86412954BA2A229AC| |BF4CBE11E41999E0DDDC27AD1F79F623BF34F2CBC2EF906C0650F9016BC709AB4D5| |9ED48479BB6DA12D9C71033861883883D88D83D6433845C86929CCB116971AC13BF| |C9FB4D5C658EDC608E5D03AF83535CB707E43B8C13358C3AA4B1FF71D4691C7519F| |733FBC86714398C224F8DB40C72C8BCE335B2C7E07BE6C50FE047F013B344A9E470| |3272382DC70121747C2FFD80ED2EBD020F99F9238C5F637CCB3C43AA48512E93883| |719E37D0EAAED9B493FB3DA71B57DDF5A59DBECA44DC9DB94CB36E58A4D59B02945| |15CB92A2588A27D4BEA1AD136FFB860B0567EDE77FCDA5DCA34E9AFE356698A987B| |81B733C9E78C4E3FC12F3B4335E86E3FDEA8CF78C6B17DA03F7993D2FC097CC5ED4| |785E23A06A8FBDE6DDE7BED1D17FD2D12F76F4FF01739DFEEA| |-------------------------------------------------------------------|
Lots to think about here. Thanks. 
I really ought to have realized that the purples are better in the faster recharging power. Enh obviously give their benefit more often in attacks that come up more often.
Stealth was purely a filler. I ran out of ideas for stuff to take because I wasn't thinking of grabbing assault. I'll give that serious consideration.
Isn't underslotting Dodge going to reduce my defense debuff resistance?
@Exabecquerel | 50s:
1 corr (fire/kin), 1 widow (tuna), 3 MM (bots/ff, demons/dark, demons/traps), 2 brutes (ss/wp, kin/sr)
1 def (kin/dp), 2 trollers (fire/rad, earth/storm), 2 scrappers (spines/dark, kat/sr)
I checked DDR its already at cap (%95) so no worries at there.
EDIT: One thing I forgot to mention is I am not a fan of slotting boxing with purple just to get %10 recharge and if you replace crushing impact with purple ATO set than it should be enough to perma hasten as well as making your top attack chain a regular. Instead of using a power as a set mule like that I suggest getting flashing steel (instead of stealth or elude up to you) and slotting it with five obliteration. This will let you use katana's semi PBAoE attack chain FS-LD-FS-GD trust me when surrounded this works better than having a huge ST damage. Or you can slot it like mine with eradication and remove some slots from defensive powers frankly speaking you don't need 4 slotting of LotG for that accuracy bonus since katana is a defense debuff set. Basicly more slot you can save from your defense powers means you can use them on mitigating on either your regen or resistance and it increase your survival.
On a playwise suggestion; With BU proc in it you may get %200 damage bonus with BU but procs buffs stays too short so always use it before GD which is your highest burst damage if you get lucky and got a critical with it too its a %200 or %400 damage out of the bag. I put proc into tactics becuase unlike BU in tactics proc is checked for every 10 second but as long as toggle on it willcheck every 10 second even if i am not in combat.
I'll give some thought to the PBAOE attach chain. I like Lotus Drops well enough.
I hadn't though to put the Gaussian's in tactics because I didn't think to use Leadership at all and I have bad memories of tactics in particular drawing my blue down like there was no tomorrow. But that was years ago before IOs. So I'll mull that one over too.
@Exabecquerel | 50s:
1 corr (fire/kin), 1 widow (tuna), 3 MM (bots/ff, demons/dark, demons/traps), 2 brutes (ss/wp, kin/sr)
1 def (kin/dp), 2 trollers (fire/rad, earth/storm), 2 scrappers (spines/dark, kat/sr)
I've decided to rebuild an old favorite. His old build only really gives him the soft cap and pretty good recovery. I know he can be more and cost is not a concern.
I've come up with this:
@Exabecquerel | 50s:
1 corr (fire/kin), 1 widow (tuna), 3 MM (bots/ff, demons/dark, demons/traps), 2 brutes (ss/wp, kin/sr)
1 def (kin/dp), 2 trollers (fire/rad, earth/storm), 2 scrappers (spines/dark, kat/sr)