Gun Mage Build High level In need of Feat Advice

[Nosta1300]

So I am going to a short High level Game and I am rehashing one of my old ideas

The Gunmage (Spell-slinger wizard 1) + Eldritch Archer Magus 14

and I'd like some Feat Advice on it

I am unsure what ones would be necessary to function and would I need to make it a good build

I am thinking I want to Build toward spell perfection but unsure what way to take

[Dasrak]

[Edit] I just realized this is a duplicate thread; reposted in the other thread that got more replies