What worked for me on heroic:

The joust

Phase 1: I used the tactic of bunching up the slaves, then spamming 1 + 2. I did have a macro for it though and struggled for a bit until I made a /click macro which clicked in this order: 2, 1, 4 - I bound it to mousewheeldown and it was actually fairly easy.

I actually found it better not to be up against the wall, since that would obscure the vision on my slave clients.

Phase 2: Blew the heroism at beginning of fight and burned down shaman asap, while moving out of the poison when needed. Trickiest phase imo. Once shaman was dead, I took poison-thrower next, but at that point it was fairly easy - just tank and spank and strafe out of the poison.

Eradric (or whatever he's called)

He's supposed to be the easiest of 2nd bosses - I didn't have much trouble, killed him in one shot. The three first waves are tank and spank - just kill the healers first. After that, spread out, heal whoever he hammers and hit your turn key at the light, and back right after.

The Black Knight

Phase one: Kill the ghoul when it spawns, the tank and spank.

Phase two: I popped heroism (had to wait a bit for it to cool down) then burned. Once the ghouls started running, I just walked forward with the slaves (they were lined up against the wall, spread out.

Phase three: AE heal and tank and spank.