"Deus ex Machina" Machinist Burst Rotation

[Gamer3427]

That first Lead Shot is mostly just filler to be doing some damage while you're getting the other skills set up. Doing another hot shot before hand would eat away at one of the ammos you'd otherwise have in your Wildfire rotation. As for the other buffs, having them up for longer on the skills in the Wildfire is more beneficial than having them up for the skills pre-Wildfire......

EDIT: To put it a little better, expending an ammo to have Hot Shot up for that first Lead Shot and Split Shot isn't quite as beneficial as saving that ammo and having it in the Wildfire rotation where it's essentially a fully buffed 25 potency, (20 base potency + 25% of damage redone when Wildfire goes off). Particularly as Lead Shot will only be up for three or four ticks at most before you replace it with a fully buffed version......