(Stormweaver) Max projectiles cold converted fireballs. Cheap, easy, powerful, FUN! (T16+ ready)

OP! I can't believe how cheap this build was to get running and how well it scales with end game chase uniques. Definitely the most fun build I've had since I first started playing POE1.

So in the end this turned to just another AM/shock build?

How do you guys exactly scale your dmg. I'm currently running the AM/CoS build - https://maxroll.gg/poe2/planner/sg9xz01k with the same passive tree .

I'm currently only having 4.5K mana. As far as I can understand I need that Ingenuity belt + the high mana roll rings to up it. Not sure If I'll manage to get it over 7K though. I already have the uinque Mah shield...

My fireball tooltip shows around 30+k damage. I dont have issues with clearing, but on boss fights, after 1 combo - curse/frost bomb/frost wall/comet from cos/fireball my mana gets depleted and often the boss does not die and one shots me...

Why do you guys keep upgrading the fireball damage? Dont you need more damage for boss fights on the frostwall or comet? Do you need really those +3 fireball jewels ?
What stat we need to scale for most single target damage - shock, magnitude, spell dmg or ?

What about crit, do you opt for critical chance on the tree, cuz its really hard to get on the gear as well...