You can get bless and guidance on a sorcerer easy.
2 cleric tempest domain, 10 storm thing sorcerer.
Optionally 2 cleric / 2 wiz / 8 sorc to add evocation specialist and scroll memorization - int based for spell DCs.
But bless is over rated, you can reach a consistent 85%+ hit rate on tactitian without it.
You get guidance from an early act 1 amulet.
6 attacks per round is much better than 3 attacks with bless, so you have barely even scratched the surface of fighter potential.