General

FP nerf won't even negatively impact funded FP mages. In fact, it will slightly benefit funded FP mages with less delay on meteor shower, which therefore increases DPS.
Longer duration ifirit is also a convenience.

Pretty much what everyone above me has said, F/p is much better with low amounts of funding, BlazeWizard does have the potential to do more DPS but the %int and %magic attack needed is greater. F/p is more practical honestly, try both out though, I personally don't find f/p as fun

F/P until you decide to a pay a lot of money and then Blaze Wizard.

They're both getting nerfed in the future (Blaze wizard for the second time and F/P for the first time). I know you don't care, but I wanted to point it out.

Anyways, if you don't plan on spending a ridiculous amount of money on this game just to cap on every line, F/P is better. Otherwise blaze wizard.

blaze wizard once you cap