X-bow Lvl 2 or Wizard Tower Lvl 7?

In one day I have an open builder, upgrade X-bow to lvl 2 or upgrade a Wizard Tower to lvl 7?

I don't have an x-bow...but I would say Wizard Tower.

You don't pay elixir for that to be active.

If u want to do xbow , then do it until it lv3 , lv2 make small different from lv1
Wizard tower lv7 is great , one shot all archers / gobs / wallbreakers (lv5)

I would say max xbows first, then wizard towers.

WT lvl 7 since it one hits gobs. Xbow 1-2 does very little more. 2-3 is much better.