do revenants go there, coz i get hell hounds a lot as a slayer task.

You can kill hellhounds in the taverly dungeon aswell :P A little easier since revenants are probably lurking at the volcano.

i normally go to tavelrey but since volcano is right next to bh bank i figured it's better.

I don't think Revennants can enter the volcano. :-k

I haven't seen any in there, but I've only been in there for 20 minutes or so.

According to rune wiki revs can go inside the volcano when following a player, but they don't patrol it. There is a bunch of obstacles to trap revs for hopping and the area around Maximillian Sacksville is not wildy either.

I spent a good 10 hours there killing greaters. Never once saw a revenant.