One thing about being on this one Corr toon since late December is that I have a good rhythm...for everything but Aeon. Damn challenging.
Almost all CoH, including iTrials I go into one of 3 modes.
1) If I can get out ahead I hit a fresh spawn with ranged AoE stun, then get into them (which introduces them to my aura stun) and the mobs are mag 4 stunned. Then I tar patch, build up, blackstar, joust back for Fearsome stare (to hit debuff) and if there is a cyclops or hard boss drop the debuff toggle on them.
2)If I am tight with team or fights are endless (+4/x8 kill most ITF) I get a debuff toggle on the biggest bad, keep tar patch and fearsome stare going, heal if needed or to debuff a harder target. Then I AoE and ST. If its a super hard target the Rez debuff is thrown at them too.
3) If it is hard to be useful as a debuffer (Magisterium final fight, Battle Maiden) I shift into Blaster mode, or if my debuffs are all in place and the target is below 50%. Scourge!!!