Feature Suggestion- targeting logic

Feature idea- allow the player to change the targeting logic for each turret (i.g. first, last, highest heath, lowest heath).  Balloons TD has this mechanic and it helps add some additional complexity and strategy when setting up your towers.  For example having a splash tower at the beginning on the map targeting last would help ensure units entering the map are hit more often.  Another is to set slowing towers to hit the most health. 

 I found this mechanic overall to help give the player more options/ways of avoiding rolling death balls of attackers that might be protected by a couple strong units at the front, or even if fast / slow units are in a single wave, where the fast units constantly move to the front and absorb the turret damage.