perfect start of a pure, either keep it 1 pray until you do dt or max pray you should get is 31. when getting pray get it from quest.
and it all depends what kind of pure you want? either a p2p or f2p.
f2p: if your going to make it a f2p pure just keep it 40 att and 1 def 31 pray max and get str/mage/range up.
p2p: if your going to make it a p2p keep it 31 pray at first and a max of 50 attack until you have leveld all stats you would also want to do dt then as your account gets better stats then get it 44 pray and keep it 1 def.