Upgrading the symbiote
So it's 24 catalysts top max him and you get 23 from 100% ing all four difficulties below epic. You can only get more from one full completion of epic.
If you can't do uncollected to get the last catalyst you pretty much have no chance of doing symbiote difficulty as you can't max it.
So for those of us who can't complete uncollected EQ what's the point in the symbiote? It's only useful in the event quests, but you can't get him to a useful level to help unless you can complete uncollected.
Very much catch 22...