Hmm, touche. =)
I tried out the B2x2-F3-Flare(Transpose)-Tick rotation in WP today. And yes, I did not quite account for the cast time reduction on Flare if timed right.
More specifically, Ive found that if you cast F3 before you "fully" acquire the UI3 buff from your 2nd B2, then your F3 remains 1.4 gcd's, but you can always (barring server/connection lag) get Flare to go off with the halved cast time.
So same 668 pot. If we somehow get BOTH F3 and Flare to have the UI3 cast time reduction, which I found to be very rare, then our rotation takes (1+1+1+1+1), and pot/gcd = 133.6
If we get F3 to start casting before UI3 is up, then we can always get Flare to cast under the gcd, and we get (1+1+1.4+1+1) gcd's, and pot/gcd = 123.7
And with server lag, we fail miserably... F3 takes 1.4 gcd's, Flare takes 1.6, so we get (1+1+1.4+1.6+1), and pot/gcd = 111.3
And for reference, the F2x3-Flare(Transpose)-Tick-B3-F3 rotation is 1026/8.6 = 119.3 pot/gcd.
So best case scenario, the B2-F3-Flare rotation is 12% better than the fully ranged F2->Flare rotation, but only in the event that you get both F3 and Flare to cast at half speed.
More likely, only one of the 2 will cast at half speed, but that is still ~4% better than F2->Flare.
But if you are laggy, then F2->Flare is typically more reliable... and of course, if melee range isnt safe... you dont have much of a choice anyway. =)
