I'm wanting to build a tanky-melee-Cleric to play with my friends that play only casters and ranged damage dealers. Specifically I'm wanting to try a H-Orc Cleric/Barbarian. I've looked around for builds and only found kind-of-similar stuff, mostly THF barbarian clerics. Given that I'm going more for bulk than dps, I'm looking to use a one-handed weapon (warhammer with Onatar) and a tower shield in the offhand. I've never built a character that actually uses a shield, so I really want to give that a chance for once.
My general thought right now is Cleric 15/Barbarian 4/Fighter 1 choosing Onatar and Strength domain. I plan on taking Shield Mastery, Power Attack, Warpriest, and a smattering of barbarian/half-orc enhancements for damage and such. Other than that, I'm not sure how I should approach the build (skills, exact stats, etc.). Everything I find online is THF based or Paladin based, but I'm specifically looking for a shield-toting Cleric. If there's any build for this that I missed or any key points of advice for a shield caster, I'd appreciate it.
Quick notes: I'm a returning player (off and on for the last several years) on Cannith. I'm not VIP. This would be first life. I don't have Ravenloft or Sharn (working on that). I have 32-point build and Harper but no other trees. I'm just planning on heroic stuff for now.