Bloons Tower Defense 5 - Daily Challenge 26 April 2013 (Machinations)(NAPS)

One of the hardest challenge, tried like 20 times before this :)

Machinations - Bombs, Tacks, and Spike Factories, Switch rounds 24-60. The bloons have plotted to thwart your towers with rank changes. Green to lead. White/pink to black. By andrew41915

Video is on 3x speed
No Agent & No Premium
(Please comment if you have better strategy)
For more walkthrough: http://bloons-tower-defense-5.blogspot.com