Think about the combo rewards again! Atm they are just not right. 10 gold for a 25 combo, but just +5 for all the next combo stages isn't really fair. Meaning a 20 coin reward for a 100 combo, while you can earn 10 with 4 25 combos.
I would give this game a 5/5 if it weren't for the many bugs that I encounter. I can't conquer villages, even though I'm already able to conquer the King, but just with my game I started first. Also I don't get any further quests from the royal contigent and sometimes it won't load the monthly update. Without that you are barely able to get enough crystal, so that I'm already in year 4 with 2 maxed troops.
Finished with lvl 17 Commander...machine gun(first blood) with ammo fed and a lot of jumping, crouching and longe range shots do the trick! Shot the parachutes, often they won't attack you immediately