what is the benefit of attacking with jets(also) as opposed to just attacking with large amounts of troops?

Strength, I believe troops are 0.5 jets are 2 and tanks 4, turrets are worth 2 if I remember correctly, there's a place where all the values are listed but I can't recall the link, someone should be here shortly to expand on info :-)

Troop is 1 offense/defense. Jets 2 offense. Turrets 2 defense. tanks 4 offense/defense. Add these numbers plus weapons %, bonus modifiers, allies. It can vary on market for co$t efficiency. Troops serve as defense, so if you're in a bad neighborhood this might not be a great idea. It's also up to your math skills. I wouldn't PS with them unless you absolutely need them to accomplish the attack.

Are you sure troops are 1?