Forgot how to add stat bonuses...

So im still quite nooby when it comes to modding. I was making a special version of shroomite and chlorophyte helms for post-moonlord use, and forgot how to add normal stat bonuses. all i knew how to do beforehand was add player buffs

I need to be able to add: damage, crit, ability to cloak, %chance to not consume ammo/throwing, +mp and hp, +minion cap, +movement speed, increased mana pickup range, 15% of damage received restores mp, knockback immunity

Just incase no one wants to help...

Forgot how to add stat bonuses...