fc map doesn't have the same cap as other maps though,
you can go slow through it with a barrier buffer and generate an awful lot of exp,
ive managed to go from lvl 1 >14 on a few chars doing that
but 99% of the time its more productive to just speed through several times in under two hours and promote,
if you get a team you can even smash it out in sub 10 minute runs and promote twice in the time it took you to mess about and farm up 2 levels on one char, well so long as the rouge you take is a newbie that does 1>100 damage per hit, otherwise your going to need a lot more games to level, same goes for perilous your cap on exp gained is largely restricted because someone will be using high end rouge and getting at least half the kills which is why those sub 10 minute runs only give half the exp.
personally I would rather speed through a different maps since you can get the time down lower especially if you have a good team that's 1 /2 shotting most stuff