Thank you guys for the responses but yes I do want to play a holy warrior using the paladin class as a base. I have read that the Paladin has a good op ceiling and its the only class I've looked at but never tried. I've looked at Favoured Soul but I'm going more on melee than spells but the occasional spell will help (also battle blessing is awesome)

I agree with Toapat, that a holy warrior is first and foremost a combatant and that's really what I'm aim for. A possible build would be Paladin 6 (using Mystic Fire Knight sub levels)/Fist of Raziel 10 with 4 levels of Knight of the Raven or some other class as I'm not sure how long the campaign will go for.