Eco/BTDB2/Strategies

Eco is much more advanced in Bloons TD Battles 2 than in previous games. The below strategies should help assist with growing eco and spending money wisely in terms of eco.

Optimization of Income
This is for best income per dollar, though not necessarily accounting for bloon send speeds.

Best income per dollar:
 * Rounds 1-2: Blues
 * Rounds 3-4: Greens
 * Rounds 5-9: Whites
 * Rounds 10-11: Leads
 * Rounds 12-13: Blues
 * Rounds 14-17: Greens

Best income per time:


 * Rounds 1-2: Reds
 * Rounds 3-4: Blues
 * Rounds 5-6: Greens
 * Rounds 7-11: Yellows (although you likely need to intersperse with Whites or you will run out of money)
 * Rounds 12-15: Whites

There is also this post on Reddit for describing best eco sends for specific eco quantities.