Okay, so I'm working on my fire/fire dominator build in mids' and I was wondering what the actual value of six-slotting hasten is in terms of global recharge.. and I think I came up with some fuzzy math that provides me a logical reason to avoid it despite just missing out on perma-hasten.
Say you have around 90% global recharge and 99% recharge slotted in hasten. That gives hasten a recharge of 156 seconds while it's down and 125 seconds while it's up. So lets try and calculate the actual downtime. You cast hasten, and for 120 seconds, it should recharge in 125 seconds. So 120/125*100 or 96% of the power has recharged after it wears off. Now the power must recharge the remaining 4% according to the 156 second recharge while hasten is down. Thats 4%*156, or 6.24 seconds. The power is going to have a recharge of 126.24 seconds at this level of recharge. (I made this math up, so I could be very wrong. Thats what Im asking you to confirm.) The average global recharge bonus is uptime over recharge times the global recharge bonus, so 120/126.24*70 = 66.54%.
Obviously, with perma-hasten, you are going to have 100% uptime, so 70% is your permanent global recharge bonus. Slotting 3 more recharge IOs in hasten would give hasten a 119 second recharge (using the conditions from above, 90% global recharge), and since hasten does not double stack, you will never get more than 70% global recharge from hasten. The difference between the two situations is a mere 3.5% global recharge. So in reality, for each extra slot, you are getting about 1.16% of global recharge per additional slot that you throw into hasten. This is slightly better than the 5% you get for 5 slots of red fortune (1% per slot, not counting the base slot) but a 6.25% recharge bonus for a 5 piece set (i.e. positrons blast) is more effective in terms of average global recharge (and this is without including the extra average recharge that having hasten would give you because of the extra global recharge). Just thought Id share what I think I have found with you guys. Hopefully its not all too wrong. Of course, in a different situation with lower recharge, those extra slots would probably make a much larger difference and might actually be worth it. Of course, I am looking at this only because I can't find anywhere else to throw in a set for that extra percentage, but the point is that it's a very inefficient way to achieve additional global recharge at already high levels of global recharge, and probably shouldn't be done.
Any thoughts or comments? Did I miss anything? To be honest it's still a tough decision.. I really would love to have perma-hasten and perma-dom.
Also, if anyone has a fire/fire dominator build which they wouldn't mind sharing that has permadom and a good deal of defense, I'd love to see it. I'm struggling with making a dom that's survivable, permadom, and has no endurance issues.