Easy tips to get the hard badge:
- Play manipulator: Max third skill first, followed by first skill.
- Invest into two attributes to max out through items (Martial and Melee worked for me)
- Save up combo blocks that are not invested into; and use the conversion to one of your invested attributes for big combos
- Save stat points for when you need them (end stage you should invest stat points into HP, as it gives you 2 HP per stat versus 1 to the other attributes)
I cleared the game without using any of the power ups.
Upvote this.
1) Buy bombs, then mana/units from shop
2) Upgrade defense+push first.
3) Spam spawn soldiers, wait for enemies to stack, use ice bomb (2), then regular bomb (1), followed by 3 and 4. throw in 5 if you have it., then use spells on your soldier line to push them past the line. Win every battle in one/two waves.
Bump this up, you're welcome.