Dunno if someone already said this but... Jiraya has the same chase as Tobi so I can recommend Jiraya/Sage Jiraya as replacement for Tobi. I tried him(Jiraya) as Tobi's sub with the standard f2p Crimson team (CF, tobi, hinata, kabuto) like a month ago and worked rly nice imo. Well... I heard that he can get a little buff with 2.0 so he should work for you imo.