Throwing the grenade first almost defeats the purpose in my eyes.
The smoke is to slow them down so they're already stuck by the time you throw the grenade. Making it so they can't get out of it, or hopefully exposing themselves by having to jump to get out.
Although in my opinion it's better to just smokes separately most of the time as Spike nades are now the best option. They're pretty effective by themselves.
& in order to wombo with a Spike you usually cannot throw them in the same spot. You have to get them with the smoke & then stick the Spike to a wall to get them.
But if we're talking voidwalls or vortex then definitely Smoke first.
My advice would be to use Spikes though. They're extremely powerful right now & can do some pretty hefty damage by themselves if they're placed well. But if you can get a smoke off with the spike they're definitelyyyy finished lol.
Usually I throw the grenade first. The smoke is more of a finisher for me. I'll definitely use wombo, but I'm more likely to throw smoke at enemies that have half health or something.
I love those hunter who do that dumb combo hello I -blam!-ing see the grenade going for me good thing I know how to skate, and beat the shit out of the hunter
Well for one it traps them, but also most people are right handed do it would be more likely to have someone press Rb then Lb of they are required to press both in quick succession.