I used pistol/shield with Elixir H/Elixir B/Elixir Gun/Elixir U. I could take and dish a decent amount of damage. You could drop plenty of boons on yourself, stack durations of Elixir B’s swiftness with (if you get it instead of regen or prot) Elixir H’s swiftness to where you have almost a constant 45+ second buff of swiftness. Also, you could throw down Elixir B from tool belt to allies to give retaliation and/or yourself, get the retal buff from the actual skill Elixir B and toggle elixir gun (which drops a combo field light if you have the adept trait from Tool: Kit Refinement) out and switch back to pistol shield to use the burst off Magnetic Shield’s combo finisher to give out a decent duration of retaliation to yourself and/or nearby people.
Sorry if that was really long so there was alot more I could think of but it’d take too long.
tl;dr Pistol/Shield Elixir H,Elixir B, Elixir U, Elixir Gun. And supply crate is amazing imo.
Oh also Elixir U’s toolbelt is dicey but you can do some interesting things with it, like stack chaos armor or stealth.
