builders can be friends

i have a concept i just thought of
It is where you can use multiple builders at once to speed the upgrading of a building


for example if you had a level 11 cannon and would like to upgrade it, the time it would take would be


1 builder: 6 D
2 builders: 3 D
3 builders: 2 D
4 builders: 1 D 12 H
5 builders: 1 D 4 H 48 M


But you would have to make the builders friends first before being able to use them together

But I would say also have a cost to make them work together to keep them from advancing too fast when they finish upgrading a town hall for example

This idea have been ruled out by supercell. Please read the sticky first before posting.. Thanks :)