World Tower Defense - Petrified Plains Arduous PB

I don't know why but the silver drones are so much harder to deal with than the granite drones. If it wasn't for those drones this map would be as easy as the others but unfortunately I've only ever managed to get past them once (Which I forgot to record). 0:00 Early game 3:10 Rusted 3:52 Downtime 4:58 Glazemancer 6:52 More downtime 9:35 Pre-SupaSpeedster 11:37 SupaSpeedster 12:36 Subtle foreshadowing 13:42 Terminator and Executioner MK II 15:08 Even more downtime 16:23 Mathematician and Avenger 18:10 Super Speedster and Blute 20:01 Silver Giant 21:02 God I hate Silver Drones so much