honestly saving these tickets with a pending update is probably the right call. But my picks would be Luke cage and destroyer. Both their t2s give them reflect abilities, physical and energy respectively, making them good in modes like shadowlands and alliance conquest. Groot is also good in those modes because his t2 grants a heal to all characters on the team. Warwolf will boost alliance battle scores, but is overall unimpressive otherwise. Probably these would be the better bets since they help more in the late game content modes.