Just as a side note, comment to the Firestarter opener.
If you get a Firestarter proc, would this rotation be stronger?
(Starting oGCDs at the same place) F1 > F3 > F4 > F4 > F1 (get proc) > F4 > F3p > Swift > F4 > Convert > F4 > F4 > B3.

Difference to the one in Aikaal's post is that you use Swift for F4 and push F3p one GCD forward. With Ley Lines up, F4x3 is fast enough so you definitely won't drop AF3 to cast B3, so there's no mana loss there.
This only works with the proc since you won't be able to cast F4x4 without dropping AF3.