Increasing builder speed using gems
I know loads of people have probably already asked to increase builder speeds, but maybe not the same way, so I'll give it a try.
I'm at a level now where upgrading some important buildings, like the spell factory or my Barbarian King, has a multiple day waiting time. During this time, the building (or BK) is unusable, and that can have a huge effect on the outcome of wars, which we have twice a week. No spells would basically cripple my attack and the BK has a large part to play in practically all my attacks.
Could there be a way to boost the builder speed by spending, say, 10 gems to double the speed of a builder for a day or for the duration of the upgrade? Similar to the boosting of barracks or resource collectors.
Many thanks for reading.