If you do consider making it an all creature deck I would consider adding Zoologist probably a Courser of Kruphix so those two can sync well. If not all creature then I would also recommend adding a Primal Surge but id also recommend adding a few non permanent spells with that so it stops the flow otherwise you would deck yourself in a turn. Also considering consistency of mana you could always add a few creatures with landfall. Maybe also add in Seize the Day, as it gives an extra combat phase and an extra main phase and untaps Ruric Thar, the Unbowed, thus allowing him to attack again and deal even more damage if the opponent had managed to survive or even taking out two opponents during the same turn instead of waiting for the next, the plus to Seize the Day is also that it has flashback.Maybe a Radiate as well haha. Also id suggest getting rid of Dictate of the Twin Gods.Also im quite the skeptic on Orcish Lumberjack as it forces you to sac lands and you don't really have a direct way of returning those lands back to the field if need be. I suggest the four main ones that can be replaced in my opinion, would be Dictate of the Twin Gods , Orcish Lumberjack , Eternal Witness and ,maybe Revel of the Fallen God, otherwise most likely one land.

I took out some cards that were not really performing as much as I had hoped. Savage Beating, while has an awesome name is a bit obsolete since I have Aggravated Assault for as many combats as possible. Inferno Titan while it was powerful I didn't play it over some of my other cards that are bigger and slightly better like the Atarkas. A lot of my mana comes from ramp so I don't think that Thran Dynamo got above the line. Polis Crusher was only to stop someone in my playgroup but other than that I can do better. Savage Twister is one of many mass damage spells and I have many of them to spare and this was the worst one out of them. Kodama's Reach is one basically another cultivate and its not the best for my curve.

I put in Zhur-Taa Druid for a mana dork and some small damage over time. Bloodbraid Elf to get a bit more advantage out if the cascade trigger. Some trample and more bodies with Skarrg Guildmage, some more mana and a win-con with Shaman of Forgotten Ways. Shamanic Revelation for card draw and some lifegain and Burning-Tree Shaman for a good body for the cost and to punish players over time.

Ill be play-testing soon so hopefully there will be some improvements.