if team 1's squadrons of X-Wings, TIE Fighters, TIE Interceptors, TIE Bombers and K-Wings run at Leviathan and Ravager, shit is over within 30 seconds max
if it's just capital ships vs. capital ships then i guess 15 seconds of exposure towards Viscount's fire alone would slaughter them, with 2 others I'm not sure if it's 2 seconds or 3.