Th10 problem lab

Should I upgrading my barch army to lv 7
or other army
if I upgrade my barch
that mean elixir cost will be 1.5 times th9 barch cost
what I should do?

note I am not war only farming

Do it. If you farm productively, I don't see the problem.

I plan on upgrading the 3 dark troops first (minion,golem,lava)
to give me more elixer for camps and things.
Plus,as my heros get more expensive,I'll have an easier time
upgrading them if I'm not spending dark in the lab

Elixir maxes out quick in the long run so lvl 7 barch is totally worth it

I'd say barch

Go ahead with BARCH.