Make minotour can be hire in gems.
Even as a F2P, I would say making some exclusive heroes is ok. It makes us come up with alternative strategy for what we have so that we don't follow an 'online-deck' for everything. Well I'm only 65k might so my view can be blurred but just voicing my opinion.
This sounds like a Suggestion.
Moved to the right forum.
And sadly, I don't think Mino will be rollable with gems on Castle Clash. Try Clash of Desert. Mino there is a shard hero...
I think Mino is a good reward for p2p. If you want it buy gems to get it. If not sorry but you can't get it. And I think it is not really necessary. I dont have the majority of goos heroes ( bad luck) but I can do each mode including guild wars without problems.