Samurai will share the gear with Monk
Red Mage will share the gear with current casters (Summoner & Black Mage)

We don't know what second or third stat they prioritize on, however since it's just leveling gear (till 70) I wouldn't worry much about that. Now if there were a set that would have parry on it, just like tanks have in most cases, I would say go for a set that has something else on it. But since that isn't the case for dps at least not for now, any 250-270 Mnk/SMN/BLM set will do just fine.

Accessories would be STR in case of SAM and INT in case of RDM.