Couple different options here for you. Arbor Elf for some better ramp, Golgari Charm instead of the Sheltering Word word will protect your creature if the spell is targeted but not on a global wipe, the charm will protect on that end and also gives you some flexibility to also remove enchantments and can work as a token removal. As a pair for the Predator Ooze try a Nightshade Peddler then even attacking you is a risk as its only going to pump the Ooze and they are less likely to block as its only going to increase the size of the ooze again.

Bioshift, have a nice day!

mmmm just gave me a great idea for a deck centering around Predator Ooze Nightshade Peddler and Rancor ....

I'm a huge fan of Burst of Strength with the Corpsejack Menace and Desecration Demon, and I think it might be of value in the deck you have here.

I agree. Bioshift would be great.

if your going to do that you dont need the elk just add another geist and head and forget savagery go with miracles instead Blessings of Nature. Also adding Feed the Pack is a back up plan should you suddenly require a ton of blockers vs token populate and such. Hope I helped

Maybe 4x essence harvest is too many try 2 and 2 farseek to speed your mana along.

I think honestly you need to lose some of the cards. There's a rule of thumb that if you have more than 12 or so unique cards in your deck (you have 15) that you should make sure that all of them are useful and needed. I'd lose Ring of Kalonia, Dawntreader Elk, and maybe Increasing Savagery then increase Strangleroot Geist, Rancor, Slitherhead, and Alpha Authority. If possible i'd use Arbor Elf and Dreg Mangler.

Take a look at Vigorously Menacing Ooze Hydra Mob for ideas.