The Bridge system is what I implemented recently and it's funny seeing it from you immediately after. Which means we had to have been doing it at the same time.
The ballista units have been very useful in my world as long as you funnel the enemies in a straight line. i use 4 ballista units they have bombers spark+/ damage boost+/ range boost and quick-thinking. They can handle a entire side if you manage to make them go towards them in a relatively straight line. Im on wave 59 so idk how long it will work.
You are using the L shaped overhang pieces and missing a crucial corner 2*2 spot. The tactician cooldown piece should go on the backside, that was nobody loses the range bonus.
I feel like endless mode is just repetitive after you've stabilized your defenses and income. I'd like to see more enemy and allied unit types. Traps seem op also.
