Breach

I know RNG and all but my HT puts breach on enemy ship maybe 1 in 20 times; and doesn't really matter what target: tie adv, HT, ahsoka, tie silencer, Biggs...all resist with apparent ease.

My bossk is g12+2 but modded for protection/ tenacity (Chewie event focus) not potency- 37%. Is this the issue? Ship is maxed in all stats, under Thrawn/chimera lead