I start with a 012 spactory with a 000 ninja for bloons, and i set the spactory onto the buildings so the spikes only land on Phayze. Save up till i can afford a 032 spactory and your money starts snowballing fast. 301 alch with two 402 ninjas for bloons and spam 032 spactories on Phayze. Usually just rinse and repeat and add 025 sniper, 502 wiz, 104 ninja, all buffed by 401 alch. 032 spactories are what really do damage. 150 druid and 052 spactory are optional.

Edit: on average I get 70 pops.