1 def obby mauler but i recomend that you get 20 attack and get defence to be a cvls tank :3 they are AMAZING pkers i've seen some videos of ones maxed at like 70 defence or with torva and they WRECK! But obby maulers are allways fun
then again i love range tanks as well so i'd say obby tank, if anything :3
Personally I'd go with the range tank just because I find it a bit more fun. As someone posted, try out obby mauler and if you're not enjoying it then just swap