I have to chime in here.
Personally, I cannot express properly the greatness that is the Ministorum Priest.
Their WarHyms are extremely useful (re-roll saves? yes please!). That alone is worth their base cost- however with just a little bit of boosting they could be well armed. Not always the best idea to spend a LOT of points on these guys - but they do have some "Not bad" inexpensive upgrades (free/1 pointers)