I'm still learning my area, so just fumbling through strain selection now. But looks like you know what works for you, which is great. I think a sativa that is acclimatised will often handle heat pretty damn well. I've had old seeds that will not burn on the hottest days in the desert, but I think acclimatising seeds has everything to do with that. Often you put these commercial indoor seeds in the sun, and they don't know what to make of it.