Von Leon Fight Question

It really depends on if you're trying to solo. Soloing at 145 will probably not work. I killed VL for the first time in a while today and it was a duo. I had a bucc who just aggroed mobs towards the right until VL got maxed out. Then I killed it while it couldn't heal. It has really low HP it's just the healing that's the problem. If you can bring someone to aggro mobs away then you might be able to kill it.