Yes he fatrolls unfortunately as theres no viable way to make him faster without nerfing health
GMB is for lore purposes but considering you're fat rolling, it does help against over-keen magic users
chloranthy ring is pretty necessary I think as 6 seconds unlocked for a full stamina recovery is unbarable especially when up against dark bead spam
However if you're fine with green blossoms, feel free to switch it out for a stoneplate ring or hornet ring if you don't know how to use a strength weapon