Advice for my Sacred Greatsword (and Fist)

[Pupsocket]

So, I'm locked into playing a big, beefy Shoanti Warpriest.

What I'm thinking is, if I play a Sacred Fist instead of a regular WP, I get access to Crusader's Flurry, and I get to run around without armor.

I lose Sacred Weapon, Focus Weapon and Sacred Armor, and my level 3 bonus feat. I gain the ability to make 2 attacks at the very low levels (with FoB). Traitwise, I'm thinking Heirloom Weapon for a Greatsword, and Fates Favored because I'm a Warpriest.

I'm unsure about feats. Not having +1 BAB really limits my options at level 1; I don't know if I will have the opportunity for retraining, so I guess I'm taking Weapon Focus: Greatsword at level 3 and Crusader's Flurry at level 5.

Feat suggestions very welcome. And if I could find a way to flurry with an Earthbreaker, that would be so great.

[Imbicatus]

The only way to flurry an earthbreaker is Sohei 6/Weapon Master 3 (or normal fighter 5)
No Golarion deity has the earthbreaker as a favored weapon, so crusader's flurry is out, and Sohei normally can't take the hammers group for weapon training.