My defense level is pittering along quite nicely. Takes a bit more time with slayer, but the 100k plus per task is rather nice. Loving my Guthan's set btw. Best 5M spent for sure.
with those stats you could almost have just done the seer's village hard diary for enhanced excalibur to heal with. let alone a few more summoning lvls til bunyip. and saved the 5m for other things.