I've been extremely impressed with the Warlocks with a splash of paladin. Their ability to out-tank and out-dps is astonishing. I've never played a caster before, but I want to do so now. Can someone help a beginning caster with a build guide for 18Lock/2 Paladin shield-bearing 'tanklock?'

What beginning stats? Feats? Gear recommendations? Skills? Spells? Spell rotation? Changes along the way?

Many thanks in advance!!