It's 56% chance to get a 3 Seal Astrodyne, but you're almost guaranteed a 2 seal. Both 2 and 3 seal are worth less than 100 potency each. At this point you could probably take Redraw off your bar entirely and the overall loss on a raid fight would be 0.5% or less and even Astrodyne itself is worth maybe a few % and is mainly there for mana economy. The whole system is just a waste of hotbar space.