Heros should NOT need a builder to upgrade
With 40 hero levels, Heros have a massive cumulative upgrading time requirement...
Why do they even need a builder anyway (continueity speaking). It's a troop not a building. No other troop needs a builder to upgrade. Just resources and time (in the lab).
Dont they just get drunk on Dark Elixer then need a few days to sleep off the hangover?
Because of the extremely high amount of levels compared to any other troop or building, Heros would not be good candidates for Laboratory upgrades (like how other troops are upgraded would not be suitable for Heros).
What do you think?