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Try the following games:

Giants and Dwarves TD,
Incursion 2 The Artifact,

And since you liked Cursed treasure 2
you can also try

Cursed treasure 1

The first part of Incursion is also on the line (lacks heros, but its a very good game)

And if you go on for more TDs you can also try the GemCraft series (GemCraft Labyrinth), Protector (parts IV and specially IV.V), Monsters TD (1 & 2) and Mushroom Revolution... all great TDs.