do you think that since the B2 kids didnt use their slabs, that the trolls can use then (ei kanaya use jades slab) because of same aspect? or is it hard wired for specific DNA (since the game has their DNA because of paradox cloning) and that this is checked through the blood?

Jade’s Sacrificial Slab was at the center of the moon of Prospit and Jack Noir destroyed that planet early on in their session. As for whether or not players who share aspects can ascend on the other player’s Sacrificial Slab, I’m really not sure.