Not doing any sort of math but just trying out my latest toon in Abandoned Sewer Network. Here´s what I came up with.
This toon is fire/kin build(atm at level 38). Currently the only powers I use are the ones below(and how i slotted them):
Slotted Transference 1acc, 2 recharge,3 end rec. Making it recharge about 85-90 end in one hit, while still draining even bosses to almost nothing, leaving them without toggles(in case of CoT, and no aeholds in case of rikti ments).
Transfusion: 1xAcc, 1xRecharge Red, 4xHeal. Heals up moderately good since it´s the most powerful aeheal in the game, need to make sure it hits though, thats why the acc.
Cinders: 2xAcc, 4xRecharge red. Face it, you WANT to hit everything at first go, not bothering to use flashfires+fire cages. You´ll know why soon enough.
Flashfires: slotted same as Cinders.
Siphon Power: 1xRecharge Red.
Fulcrum Shift: 1xRecharge Red.(so far, will slot it up next level)
Speedboost: 1xRecharge Red.
SuperSpeed: 1xEnd cost red.
Assault: 1x End cost red.
Tactics: 1xEnd cost red. 5xAcc Buff
(This build assumes I have 6slotted Haste and Stamina as well)
These are all the powers i use to solo, no matter how many bosses/liuts there are in a group. I do the fastest exp with groups of +1 or +2 levels considering exp vs time factor.
This is why for fire/kin imps are wanted in quantity, nothing more:
Enter sewers, summon 2 groups of imps, just enough time to waste speedboosting them. Superspeed up near the first group of monsters, targeting the nearest boss, as soon as the imps agro, youll have your third bunch of imps ready, summon them somewhere in the middle of the group and transfusion on the boss(regaining all your end). Imps have agro already, so youre safe to use cinders. heal the imps once, then have transference up again ready for the next boss, but before that, Fulcrum shift and siphon, then drain him empty and refill. This keeps your endurance bar never hitting below 40%, not getting targeted by holds from liuts/bosses and your imps at 3xsummons perma and after the first group no need to speedboost them either. No sweat.
So i say 1 dam, 5 recharge on Imps if youre kinetic and slotted this way. But hey, Just my own preference since i like to play it "safe" and optimize my efficiency vs just slightly more powerful mobs.
Stay safe out there.