So in the list I like to run I have room for 4 stormtrooper/snowtrooper units. I wanted to get opinions on the three combinations im stuck between

4 stormtrooper squads w/ DLT each

Or

3 stormtrooper squads w/ DLT each and 1 snowtrooper squad w/ flamethrower

Or

2 stormtrooper squads w/ DLT each and 2 snowtrooper squads w/ flamethrower

What else is running with the squads? That would impact the decision.

I'm currently favoring a 2 Storm:1 Snow ratio; not that that helps when taking 4. Generally I reach for Storm first, but it does depend a bit on your commander. Stormtroopers generally work better with Veer's static firebase playstyle. They can be effective while hanging back to get Aim tokens and provide Guardian. The HH even works with him somewhat. Vader I feel prefers the Snowtroopers, who can keep moving along with him. That said, I'd still vote 2 Storm:1 Snow with either commander; that's just how I prioritize getting there.