JS and ( if I'm not mistaken) JR doesnt have a training penalty for overgrown players due to Nowitzki type of players from RL. So the only skills you dont want to train much because of the speed are OD (which he has at 7 which is good to go for a big men), HN, Dr, Passing. Passing I wouldn't rule out as he could be turnover prone (depends on the oppositon he will face) so maybe it would be beneficial to upgrade it to mediocre one day (possible secondary pops in HN and DR wouldn't hurt either). Otherwise inside skills are way to go. Those out of position players from draft are actually blessings in disguise if they have reasonably distributed skills, especially the defenses.