I slot Fast Healing, Health & Integration with 3 Heals
Instant Healing, Dull Pain, Reconstruction with 3 Heals 3 Recharges
Quick Recvery 3 End Mods
Don't slot Resilience, Don't have MoG or Revive
works for me, got me to 50 ok
My current slotting seems to work out quite well for me.
Fast Healing: 1 x Heal
Reconstruction: 3 x Heal, 3 x Recharge
Quick Recovery: 3 x Endurance Modification
Dull Pain: 3 x Heal, 3 x Recharge
Integration: x x Heal, 2 x End Redux
Resilience: 1 x Dam Res
Instant Healing: 3 x Heal, 3 x Recharge
Moment of Glory: 3 x Defbuff, 3 x Recharge
Revive: 1 x Recharge
@Death Badger
Don't take MoG!? That power has saved me soooo many times!
I'm with you on Revive though - I only took that because there was nothing I wanted at 49.
[edit]
Just noticed you asked for advice on using them as well.
Reconstruction: Very useful now that IH isn't a toggle, it's up pretty often and is a nice heal. Best advice is to save it till you're below 50% health.
Dull Pain: I find this has two uses. When you could perma it, I used it mostly as a constant boost to my health, but now it's a great emergency heal which gives you added survivability and is very handy to pop before a tough fight.
Instant Healing: I don't find this that great as an emergency power, or not as one you should be hitting when your health is in the red. If you can spot when a fight is about to g bad, it's great. But I also use it just before going into a big mob/AV.
MoG: This is the real emergency power, gives you a massive heal just before it takes your health so you can hit it when you're very low on health - and once slotted you can survive for ages (or get really unlucky and die fast 
). You've just got to remember not to use it against Psi villains or anything that debuffs defence.
Couple of comments:
There isn't any point in slotting reconstruction with 3 Recharges, mathematically, the third Rec Red gives you an exta second or two off the recharge time, it isn't worth it. Put the slot somewhere else.
I have Fast Healing, Heal, Quick Recovery and Stamina, all 3-slotted. FH and Heal are vastly underrated. I quite often forget to turn on Integration and don't notice until I get hit with Knockback. I also have Resilience 3 slotted (but then I also haven't worked out the maths, or used my free frespec).
[ QUOTE ]
MoG: This is the real emergency power, gives you a massive heal just before it takes your health so you can hit it when you're very low on health - and once slotted you can survive for ages (or get really unlucky and die fast ). You've just got to remember not to use it against Psi villains or anything that debuffs defence.
[/ QUOTE ]
MoG is a good one to fire off when all else is failing. Doesn't really matter whether it heals you, it will drop your hits to a very low value, but then it won't move... Unless you happen to have a mob with an auto-hit aura, or Psi, or just very good accuracy, or def-bebuffs... It's very situational. Your best bet is to use it as an escape power, if you actually have to use it in an emergency. You can also use it against Malta since it gives you a massive endurance recharge boost against Sappers.
Instant healing is a really good power for sappers and Ringmistresses as well. Why? They made it a toggle. You can't use MoG against Carnies, since they pump out Psi like a water canon spews water, but you can stuff IH on so that when your toggles drop, you can still survive to flatten the little beggers.
Dull Pain has another use. It raises your hit points. IH's heal rate is based on a percentage of your Max HP, so IH works faster under DP. MoG reduces your hits to a percentage of your Max HP, so DP means you have more hits to work with in MoG. (Just remember, DP then MoG, otherwise the DP has no effect.)
Disclaimer: The above may be humerous, or at least may be an attempt at humour. Try reading it that way.
Posts are OOC unless noted to be IC, or in an IC thread.
Got a pretty good idea but can those with more than 26 levles tell me how they would slot regen powers. I want them ALL as they all rock. Whats the best way to get good use out of them.