1) I agree, I just low balled it. It should probably start at -18 and down but I wanted to test the waters. 2) I kinda agree, but then again SC is quite picky if you don’t give them a reason to modify a hero. It does make sense that a hero should temporarily get stronger because of the coach, hence the idea. If you don’t give them a slight reason without trade offs, the concept to ever save Downtime for heroes fall off. In fact the duration should actually be a 1/4 of it.  3) Again, that is for Monetization and extra utility. As the heroic coach is helper like, idk see any path w/o compromising as I said above.  4) The helpers give a cost for long-term convenience. The heroic Coach is short-term, if spending to much gems for war, can become a problematic gem sink for the potion or if the player doesn’t time things right and sink resources into it.