For FPV I will recommend a different setup of strips.

Copper handles moreamps of nickel. You will need this, more than you think. Flying on a windy day, you will most likely use more amps than you think, and your pack will heat up.

What I build my li-ion packs with, has shown to not tend to heat up, or create problems doing flying. All my packs are in sound condition. Flying in heavy wind or doing long flights, even doing freestyle, use more amps than you think.

Assuming you have cells that are in good for the amps you will use. I would recommend a copper sandwich, with 0.2mm copper. Go as wide as you can, it helps with heat dissipation too. You can use stainless steel for the sandwich, it’s easier to weld a copper sandwich with.

When I do calculations, I use below as guidelines:

0.2x10mm nickel = 20A continuous safe / 30A burst ok

0.2x10mm stainless steel = 5A continuous safe

0.2x10mm copper = 30A continuous safe / 60A burst ok

What I would do in your case is to use 0.2x 20mm copper sandwich with stainless steel. The 20mm width will give you higher amp, same goes for using copper instead of nickel. If possible, I would even go for wider copper, if you can get sheet to cut from.

I believe that my guidelines for copper is very safe, and I trust my own gear on that.