Personal opinion, but for Gladiator and Marauder I'd probably go STR in both. More health is great and all, but if you don't -need- that extra health, I'd rather just be killing faster/generating more threat/enmity.
edit: But yeah, no idea about endgame and I won't be leveling these at launch. So, my opinion may change depending on how content goes.
edit2: Also, I think STR boosts block/parry amounts anyways?
XI Wiki


