This sounds..silly but..
Does a Flamethrower count as a rifle?
If yes:
Try Flamethrower, Elixir U, Elixir B
Firearms for Juggernaught Trait
Alchemy for HGH Trait
Does quite some damage at moderate range; perma Stability and Nice might stacks.
Yeah this sounds plenty silly.
Why would anybody want to use turrets for anything? They’re allegedly still as buggy as they were years ago and they’re as weak as they can possibly get.
And what does this have to do with Protoss???
You can play whatever you want to while leveling.
Unless your engie is some kind of wizard a p/p and rifle build is gonna be hard to make.
For leveling you can use a bent selfie stick and armor made out of Charr hair and still kill mobs so I fail to see the point in trying to make something [slightly] more elaborate.
Yes, FT with Alchemy: HGH, and Firearms: Juggernaut is great for leveling and openworld pve
And what does this have to do with Protoss???
Early Starcraft one of the ways to win as Protoss was to just cannon the world =)