If you don't mind being bored out of your mind getting charms, then a summoning tank could be quite fun. 75 defence and basically the highest summoning level you can get too, and you would low level pures in multi. Pk with a DFS and Torag, and for a familiar use the highest level Minotaur you can.
Go with a range tank. They are a lot of fun. Get 99 range, 99 def, 99 mage, 99 hp, 75 attack, 75 strength, 44 prayer maxed at 103 combat. They are great for staking and PvMing. Get veng and hand cannon and you will kick ass in wildy.