Well all squads are only as useful as the hands that operate them, and is varied.
For me perhaps the only squad I do not use is medic. they arent usless because they are defacto assaulters…but I find “for me” being a medic “squad” is pointless.
I pretty much use everything else, for some situation.
I guess sniper squad is in the same boat, snipers arent useless, But my radio squad with a sniper makes for a better sniper squad IMO
I found mortars effective on defence as well. people lack imagination. at the start of the match draw a line between the attackers spawn and the objective, and intercept. Always going to be a bunch of spuds/bots on that line (ofcourse map dependent like attacking mortars)…sometimes, team mates actually spot the APCs too…yay