Feature request: Spell factory/Hero boosts.

Hey, just here to make a simple, straight forward feature request, have two options for boosting spell factories and heroes, the normal 4x boost for 5 gems and then an 8x boost for 15 gems, the armies I like to use for farming/trophy pushing take about half as long to cook as the spells, and my heroes being 23/20 take about 1.5 times to cook as my army. I would boost everything much more often if I could 8x boost my spells and heroes, because everything would line up better and I would get a lot more raids in during a boost time.

I think the difference in boosting times is just a way to make people more responsible of what they use in battles, thinking ahead that the certain spell will take a lot to cook and "do I really need to use it?". Also, the difference in boosting times is a source of gems itself since people might skip waiting for few last minutes and speed up the spell/hero to go into battle.
I think the boosting times are quite fine the way they are now..