Depends on your goals. If you plan on getting up in to the higher attack and 75+ strength part you will need prayer to compete with everyone else that will have it.
I'd say no prayer and go with the 50 att for a g maul. I'm working on my str pure right now. 40 str, 20 att, 1 def. I'm thinkin about a g mauler as well. Anyways, thats just my opinion. =)