PLEASE READ!
In order to play a map on the so called "Grandmaster" mode, you need to beat that map on every difficulty beforehand.
Getting the reaper requires you to not only beat grandmaster, but also doing it on a medium or higher difficulty ranked map.
The Maze suits accelerator perfectly.
Strategy [NOT MADE BY ME]: [ Ссылка ]
Credits to joshua, very cool person.
TIPS: follow strategy, instead of upgrading accels simply get more and reroute, as many as you feel is good, and upgrade only a few.
