Heroic Bosses progression for me was:

1st Boss in VP
1st boss in SFK
2nd boss in SFK (real easy)
4th boss in SFK (just move when he glows green... strafe back and forth... my dps goes to zero during this time, but he's super easy)

After a few days of farming these 4... i did:

3rd boss in SFK, kiting back to courtyard, stay out of his consecrate or dnd area, kill adds first. even with these workarounds he's a pretty good gear check

Then I did 2nd boss in VP which in hindsight is probably easier then 3rd boss in SFK, which then opens up the last boss in VP which is easy... just bind a key so entire group jumps, and watch bar for static cling (which you should be use to doing after farming Baron Ashbury for a few days)

Then did last boss in SFK. Just tank him pointing away from group, wait until pistol barrage before running behind (avoid turning him at all costs until he goes into that mode). Be ready with decurse for the debuff and setup aoe's for the adds. Basically just use the guides in the Heroic SFK threads that's what got me through these guys.

Somewhere in there you should be able to do the first bosses in Deadmines and the first boss in BRC, but honestly I haven't had much luck in those two after the initial bosses... so don't really farm them... I got the 8 above to farm for honor and orbs, which has gotten me almost to 346 on all my toons (provided you're doing tabard/rep thing as well)... I used the blue PvP bracers and relics to fill out those spots so a few days of random BG's for those can help, and the purple caster belts are getting pretty cheap on my server.