How about Contagion Clasp and Contagion Engine ?

Originally I had not considered because I felt that his ability is somewhat expensive, but with the card:Druids' Repository would have solved that problem.

Another problem is always the same. What should be removed to make room

I would HIGHLY suggest adding 4 copies of Doubling Season to significantly amplify the volume of counters you could produce. Perhaps you could remove the 4 copies of Rage Forger to make room, as you aren't playing a tribal Shaman deck.

That being said, I really enjoy original deck ideas like this that try to take an idea to another level (counters, in this case). Keep it up, man.

the problem whit Doubling Season is his cash cost :P.whit the Rage Forger , beyond being the only shaman, his second ability has much synergy with the rest of the deck.

Thak you very much! between the friends with i play the idea of the deck is usually above other things. Sometimes mechanics, other tribal (the squirrel deck of a friend is a symbol in our group)