I've got an obby-tank, if you're interested. All stats are 1 except for Attack: 50, Strength: 60, and Defense: 50 (Constitution: 55). He's level 61-62 last time i checked.
Technically 1 def 1 pray and DT done is not possible because of the little quests that u have to do til DT...minimum 13 pray i think or 11....
I have a gmauler if ur interested http://sythe.org/showthread.php?t=1064907