You guys don't find two healers slow you down? I see if is very common among boxed groups, I do have the option for two healers with my current group but i never go with it.

SK+Troub is a solid start for any group, troubs can be evil so that should not be an issue. I love my coercer for my boxed group, I would never replace him. They bring alot to the table, DPS buff, hate transfer, Coercive Healing (AA), Manaward(AA) and do very nice dps. They have two mana regens...one is always up, the other is a temp buff that needs to be recasted. Both of these regens can be enhanced by putting AAs into them. I use a templar for my group and Coercive Healing increases his ward Repent, and adds an additional reactive to his group and single target spell. Would work the same for an inquis since you want to play evil, although im not sure that they get a ward spell. I find manaward a nice save spell since I only run with one healer but it uses all your power so I only use it as a last resort.

The last 3 spots in the group should be filled with either 2 healers and 1 dps or the other way arround. Inquis/Defiler would work fine, although the defiler class does not do much in the way of dps and the inquis is more suited for melee toons. Maybe a defiler/fury with the fury speced for dps, druid group heals cant be beat for getting boxed toons health back up after an AOE attack. There are lots of good combos to chose from, find one that works for you and stick with it.

If you feel like doing away with the evil thing you have the perfect setup with the Illy/troub. IMO that combo is the best in the game once you max out AA. If you have access to get the Illy mythed then you never need to worry about power again. The troub can give upbeat tempo to the Illy, the Illy can give IA to the troub and TC to the other lucky caster in your group.

I will list my group below. I have tried many different setups and this is what works best for me. I am not saying its the best, its just what I like.

Pally
Templar
Illy
Coercer
Dirge
Troub