Scout Trooper

I don't think he should be a sniper instead he should be hovering in place on a speeder bike, basic would be pulling out his pistol and shooting at an enemy. His first special would be a straffing run with his speeders cannon before he zooms off and pulls in behind his group. His second special should be a taunt or buff where he punches his saddle bag, maybe at the cost of accuracy to himself but boosts damage on allies. I think they will add one after Gideon and then the Mando crew, Gideon and the storm, death magma and scout troopers will be needed for a legendary beskar Mando