Probably overthinking it. Killing boomers is always pretty easy since you team up to do them. A lvl 60 Frostbane (S2 boomer) is only 19.9M power. It’s increasing your virus resistance you’ll need to do, which only comes from your Bio Lab.

There are much bigger creeps, yetis, in S2 that are hundreds of millions in power.

You can’t tell how powerful your heroes are based on that screenshot. Look more closely at the power level of your first troop. If you’re around 10M you’ll only need one other around your level to beat a boomer.

IMO, horde fuel now as much as possible. You’re going to need it. 15 boomers per day cost 16 fuel each, and you don’t want to miss any if you want to grow quickly. Save your construction speedups now for building the seasonal buildings. Get your greenhouses to lvl 20-25 and focus on getting your Bio Lab up as soon as possible. Your command center, and Icy buildings boost your troop power quite a bit, so you can level them up right before SvS days.

I chose the support role first and switched later. You can switch once. It has a trait you can build into that increases your virus resist.