Time to post some updates...
I maxed TH9, except:
- 49 lava, the rest Lego
- Heroes grind from 13/14 to 18/19 for two months
- Lab all done, except valk L1 and golem L2.
- Idle builders...
Then I click TH10 while continue grinding heroes and walls for 14 days.
Now, 2 full months down the road as TH10, I was grinding elixir and all buildings done. Elixir are for research lab only now, and to dump into walls.
Heroes upgrading to 21/26
9 zap, 89 lavas, the rest Lego
Do I regret without fully max TH9 ? No.
My reasons:
1) extra 20 space army camp for attacking helps a lot in farming and war.
2) DE is much easier and faster with an extra drill. Attacking also somehow get DE faster.