…can you pop in and help someone soloing kazzak or will it fuck them up.

The trick w/ soloing Kazzak is that the mark makes you do ridiculous healing, so if you’re a geared enough tank you can basically heal through all his damage. Other people getting into combat w/ him means they end up getting the mark instead of the tank, which makes it harder.

Just smack him once at the end and get free loot.