Because of the sheer frequency I've been getting HHH lately, I've come to realise it's an incredibly flawed boss. I know this thread's has been dead for a good few months but I have some suggestions for HHH. Either greatly increasing his knockback resistance or implementing invincibility for him while he's stunned from teleporting may be a good solution.
I have no clue why you get this one so often.. we could always remove vagi/hhh/cbs alltogether but that would ruin the fun too. I think you can always ask an admin to set the next hale if your pretty sure you are doomed for hhh again.