I surpisingly went through 70 flags with this setup, they are some hiccups here and there, not perfect, sometimes I have to rebuild half of a lane, but other than that this lasted a long time (for me) the best out of this strategy was 30 flags, I edited a few things and went very nice. My friend suggested this to me and told me to pass it on if I went 70 flags up or higher. Cya! 
Survival Endless stuff

Survival Endless now with Giga-Gargantuars falling on your tall nuts!