I would just add that the only real way you could train them both longterm and effectively was if you were planning to turn them both into SF type players (albeit maybe with different focuses). But the atrocious OD on your center already makes that a questionable plan at best, and a Barkleyesque T-R-B-L idea if we're being honest. Generally, you should train either guards or big men, not both, until you're very familiar why that is and know when an exception can be made and have the players to fit that.