If I had it to do all over again jake, I would probably go full magic starting around level 60 as that's when I believe you can start getting exotics, before that, I'd burn any magic food with less than 26% on it, the rest save for 60+. I wouldn't go for perfection until you're well into 80, but really it seems to pay off.
As for speed, I think last night went well first off because they were nicer fractals for our group makeup (2 guardians=good attrition+less deaths). I think Mike is putting up about the same damage as me, with better survivability, just not as bursty. Sadly I'm probably only doing about 3/4 a thieves max potential because I like to have extra hitpoints and toughness rather than you know...die. In the long run as I've soap boxed before, the reason I like this game is the lack of need for meters, winning is dictated by whether you get the chest at the end of the fight, how you did it isn't defined by good tanks, healers, or DPS but on teamwork, knowledge, and strategic rezzing (all of which we had last night). So...nice work yall, was fun, now we need those folks to get to 80 so I have people to run CoF with, daddy needs a new bow/guns.
JJ