IMO Tower Defense games typically go on REALLY long, and even against bad players rushes are... Pretty much nonexistent, and require significantly more coordination to send out than they require to defend.
I think some mobs should have their base levels buffed in some way, or new mobs should be added with the intent of being used as an early-mid game rush send. Game's shouldn't consistently end once a player efficiently getting XP can send like 6 giants.
Another suggestion would be to add (or buff) other mobs to be efficient for gaining XP. Currently, the most efficient is Spiders, but the benefit of these scale off pretty quickly, and there is a huge gap in ability to generate XP and get / buff mobs and a players ability to get the XP required to do so. Making mid-late game XP gain better would again, significantly improve a team or players ability to rush.
I think some mobs should have their base levels buffed in some way, or new mobs should be added with the intent of being used as an early-mid game rush send. Game's shouldn't consistently end once a player efficiently getting XP can send like 6 giants.
Another suggestion would be to add (or buff) other mobs to be efficient for gaining XP. Currently, the most efficient is Spiders, but the benefit of these scale off pretty quickly, and there is a huge gap in ability to generate XP and get / buff mobs and a players ability to get the XP required to do so. Making mid-late game XP gain better would again, significantly improve a team or players ability to rush.