All 3 honestly. And then the two +3% DEF IOs you can put in Tough. Hover is a substitute for CJ if you're a flyer. Plop a LoTG in each with an end redux in Tough, Weave, and Maneuvers and call it a day. None of them are worth slotting for +DEF beyond the LoTG. In theory you could have CJ, Hover, and Stealth, with a LoTG in each for about another 7% defense (depending upon AT), but it's really not worth giving up so many slots.