What strains would you cross breed?

I'd cross DRGreenthumbs Bubba KUSH female x GGG Grape Stomper OG . Male .Take the offspring and the cross into GGG "oak tree " .

Blueberry (M) x Pure Power Plant (F)
Ace of Spades (M) x Pure Power Plant (F)
Blueberry (M) x Jack The Ripper (F)
Vegging the fems right now

i got 6 strains of tga comming and if i get any males there getting crossed with what ever female there is . lol..