What to upgrade? Premmie th7 from an almost maxed th6.

Recently got to th7, and immediately upgraded a barracks due to having max elixir loot. And buying most of the new stuff. Starting DE farming for the BK, got him, and now all I have left to buy is another Hidden Tesla.

what should I upgrade soon? For clarification. Lab, only maxed Barb and lightning from th6.
Spell factory is lv3. 3 barracks and camps maxed from th6 and 1 camp lv5 and 1 maxed barrack in th7. Giant bombs maxed. 3 bombs maxed and 3 for upgrades. Clan castle maxed from th6. 1 mine and collector max. 2 mines upgrading to max. Etc.

Any tips for upgrades? I use archers, barbs, giants, wbs, healers, wizards, dragon, and all 3 spells.

BK is currently lv1.