Get a higher level and go to uppers... x-8 is just like x-1, practically the same thing but enemies invade more often. I bot in the maps x-6,7,8 so the bot switches... I've been botting 3 days straight, 0 deaths.
Also as a matter of fact someone said switching something in the timing.xml and increase the time the bot stays away from enemies.... I actually decreased that and its better for me. The bot waits 23 seconds after seeing an enemy and then goes back to botting and collecting boxes.