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.