Dude, that is a question you will almost certainly have to answer yourself by trial and error.

what amp are you using? are your clean sounds keeping up in rehearsals?
whats sort of sound are you going for?

from what you were saying about not much of your tremolo picking being heard, it sounds like you may have too much distortion on your lead sound and as a result are just sounding muddy?

anyway,what amp are you using? is it that the amp isnt loud enough in rehearsals? or just that you arent cutting through with the rest of the band? If its the second one, you may have to rethink your tone...maybe a bit more mid-range?something like that?

sorry that its so vague...I'm tired