I'm probably going to focus on acc/crit/det in that order, and just ignore spell speed if at all possible for now

As for rotation, i've been doing the following (lead fights with T3 while tank gets agro)

F3 > F1 spam w/ F3 on proc > Use TC procs as they come > Bliz3 below 700 mana** > T3 refresh (if no TC procs, if so then bliz3 again if you can get it with the hasted cast time from astral 3, otherwise bliz1) > F3(repeat)

**yes you could get one more f1 off with 700 mana, but you risk not having enough mana to cast bliz3, I'd rather play it safe than end up oom and being forced to use transpose and bliz1

The cast times line up pretty perfectly, while casting T3 you regen all your mana then get right back into astral

For burns I toss raging strikes after the F3 and with about 5s left on raging I burn swiftcast > Flare > convert > f1 and then start back with bliz3

Anyway thats what I"m going with for now