What skills affects blast damage/buildup and whatnot

[Anatolius]

I only know 'blast attack', i do know that bombardier does not affect it.
So, anything else affects blast element on weapon?

[Kyukyu]

Free element/ammo up if it's hidden blast. But I think that's about it.

[X3Noel (ChocoSongi)]

the zorah set bonus (critical status thing), apothecary mantle

[Gotsa]

bombadier has no function on blast element weapon.

the skill you are looking for is "Blast Attack" which is found on only a handful of pieces of gear, best to use decorations or a charm to reach the desired effect and use other pieces of equipment, as the equipment is heavily limited to just blast attack effects and only a few decoration openings limiting the build.

below is a list of all the pieces of equipment that grant blast attack
https://monsterhunterworld.wiki.fextralife.com/Blast+Attack

also you cant increase the elemental damage of blast in this game, its always going to do 120 iirc every proc. (at least thats what teos longsword deals anyway)

skills like artillery only work for ranged users and gunlace shots.

so building around blast is kinda sketch in MHW, best to stick to raw for damage.

only dual blades can really capitalize on it or make a build around it.

[PeachyBear]

Zorah set bonus and the blast attack skills affect blast. Blast is considered a status aliment so hunting horn skills that improve that will also improve your blast.

[Anatolius]

Okay, thanks