Earth main is absolutely doable with sage naruto - just requires a bit of P2W behind it. My team is Earth, Jigokudo, Konan and Naruto and I punch up to the top three of my server, even though they have about 5k power over me.

For the OP, go all in with damage. Take adavantage of Naruto's extra chakra gain and use Earth Main, Naruto, Tobi and Kakuzu. Even if they go all in and try to take out Naruto - you still have a solid nuker in Kakuzu and his High Float - Low Float chase fits between your summon and causes high combo. Use your main's chase that chases High Float to Knockdown and ignition.