after several tries I finally found a strategy that works (spin to make the mid-size ones confused , circle them like a sheepdog to keep them penned in the middle, reaching in to grab some every now and then)
406. Now I don't have to play this stupid game anymore.
Let the turtle bounce five times then shoot him with the golden gun to pick up speed again. Don't miss. Ever. Line up the shot in advance, if he doesn't hit anything he'll bounce back into the same spot next time. I made it purely by accident with no chest bomb (although you'll want one), no nukes, the missile, and 2 reloads along the way. The five hour bonus isn't necessary if you get a good run.
also, despite being a race with a minus to spears they can defeat you in a battle of spearmen spamming in both construction time and speed and kill power.
Kill the blue kingdom before Level 25, otherwise their soldiers become incredible BS, killing your soldiers in 1 hit with swordsmen and guard, spamming halberdiers faster than you can make spearmen, and charging every 20 seconds while you get no charges in the final battle.