From memory the optimum stakes for clearing the Fulltilt bonus were at $2/4 for fixed limit holdem. I'm not sure if it's still the case but I will just assume it is.
Actually i'm playing a mix of $3/6 and $2/4 as i'm not finding enough fishy tables at either level to have a solid four or five tables running. Admittedly I did get up to six tables last night at one stage, but I'm too far out of practice with six and found myself cutting it fairly fine on timing out. (I did time out twice but thankfully it was where I would have folded anyways).
What I do find with fulltilt is that the fishy tables tend to tighten up fairly quickly, and what started off as a fantastic table to play at can suddenly turn into a TAG fest within a couple orbits. I use the colour coding available in fulltilt to mark each player, so that I can quickly see when I need to quit a table - for example when the player on my right turns from a green fish to a red TAG.
Last night's session ran pretty hot throughout and I was never really down. Ended banking a solid 50BB win to more than make up my loss from the night before and am now past a quarter of my bonus cleared.
Fulltilt bonus cleared: $83
Fulltilt bonus remaining: $217
Days left: 24
Current bankroll: $22,350
November time played: 30h30m
November profit / (loss): $1,600