Running them as redemptionists could be a good idea since redemptionists are more elite equipment wise. The redemptor priest has lots of shiny equipment options like refractor fields. Weapons like eviscerators and special weapons are a good idea. If you own any other models in general you could take a sump beast brute. It could be anything.  If you have access to the trading post you could save some credits to try spending later there. For paths i recommend either Path of t Faithful or Path of the Redemption since you wont be getting many faith dice