Originally Posted by 
Izor
				
			 
			That's right, some lists play those in order to remove problematic creatires like DR targets. Nonetheless I think that Dredge is definitely one of the few decks out there that has a pretty good matchup against vengevival. With Vengevivals everywhere, dredge should definitely be strong in the metagame. 
The best strategy still is discarding their Survival. If you magane that and have gas in your hand, it's pretty much over. Fauna Shaman is much too slow to handle Dredge's speed. In my expierience the best play against survival decks is: turn 1 Discard dork, turn 2 Therapy on Survival + flashback Therapy on Fauna Shaman. You don't always have a Therapy, of course. But if you have it, it's great.
And yes, Necrotic ooze combo can be annoying. Luckily that Ooze thing requires 4 mana, 2 of which have to be black (remember that Noble Hierarch doesn't produce black). So the earliest chance for them to have the combo together is turn 3, which is still pretty fast. But if we can pull of a FKZ win or an Iona on turn 2 we are still faster.
Another good thing is the fact that they will not have everything that harms you at the same time. Ooze lists are usually non-blue, thus don't have countermagic, and vice versa.