On live servers my solo strategy tends to be Shadowfall and Darkest Night up, then melt the group away with Tentacles and Nightfall. I have both AE attacks 6 slotted with 1 end redux, 5 damage (I run 4 slotted tactics atm).
Against bosses, particularly the holding kind, I use Dark Fluffy to distract them, then I use Pet. Gaze (2 slotted both Hold duration) to lock them down. This tactic works well against any single boss, I haven't figured out a way yet to solo multiple bosses with the tools we have available on live, though I think leading with Dark Pit + Howling Twilight might work (I don't have HT on live).
On test, things have changed drastically. First and foremost, I've dropped all of my dark blast powers except Dark Blast, Dark Pit, Tenebrous Tentacles, Nightfall and Blackstar. At level 38, I have all my Dark Miasma powers except Fearsome Stare and Black Hole. I picked up Hasten, I also have Assault (will be replaced with Maneuvers when respec goes live) and Tactics, Swift, Health and Stamina, with Recall Friend and Teleport as travel powers.
So far, I've been running Dark Servant with 4 SO recharge(w/perma-hasten), 1 SO Heal and 1 SO Hold Duration. I get 3 Dark Fluffies out constantly. They assist quite well with crowd control, healing and debuffing.
For soloing with the new set up, I get all my fluffies out, lead with Dark Pit + Howling Twilight, then throw Darkest Night on the group of mobs and start melting them with AEs. If there are bosses in the group, I try to keep them held (if the fluffies aren't already) and I mix in Dark Pit when I can to minimize the damage out put of the minions.
In groups on test, I tend to fall into a crowd control role even if another controller is there. I'll alternate between CC and blasting and throw in heals when needed. If the group is particularly control heavy I'll tend toward debuffing and blasting.
