Easy Mode Strategy
You have came here because you want to solo / duo / trio / squad in easy mode to grind wins or a beginner grinding?
For Solo: (Autoskip is always on to make game faster)
Wave 1 - Place a speakerman on front and upgrade it (or any units that you have)
Wave 2-5 - Max a unit out then place again
Wave 6-19 - Repeat Process
Wave 12-19 - You have maxed out units and max troop placement, but if a toilet goes too far, sell a unit then place it over again, this is an important strategy on every game
Wave 20 - Do as I said on the note on wave 12-19 with the boss toilet, once defeated, play again, if you have 2x coin boost, do your first summon or grind for more money and wins.
For Duo: (Autoskip is always on to make game faster)
Wave 1 - You and the other person should autoskip, this time place the units on the front (like usual)
Wave 2-5 - Max a unit out then place it again (the Team should do this too)
Wave 6-19 - Repeat Process
Wave 12-20 - Recommended to have some backup defenses on the back as some toilets can go too far (optional), or you can place more once they go too far.
For Trio / Quad: (Autoskip Requried)
(2 people of the team or one of them to autoskip, including you (as it requires 2 people in a trio team game to skip a wave)
Wave 1 - Place your units down, put on front to get a better time.
Wave 2-5 - Max a unit then place again (all teammates should do this process)
Wave 6-19 - Repeat Process
Wave 12-20 - If something goes too far then place a troop there
Why you lost at a specific wave
Wave 5-10 - You did not place units or maxed them out
Wave 10-20 - Because maybe you did not do the backup defense strategy (max them out also btw)