[Strategy] TH10 upgrade priority?

I'll be a TH10 in 9 days with gold and elixir storages almost full. What should I upgrade when I get there. Infernos, lab, spell factory and then what? I mostly barch but I know barch becomes more expensive and not sure if it is worth the upgrade. Is barch the most effective farming strategy at TH10? Also what trophy range is best for TH10 farming. Thanks in advance

submitted by Damian7
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