New dark elixir troop idea

I was talking with some friends and came up with an idea:

The troop name: Zombie
Cost: 40 dark elixir
Time to train: 5 minutes
Dmg: 10 (poison damage, 10 for every 1 second lasts for 20 seconds, 200 damage per attack)
Attack speed 1 attack per 10 seconds.
Health: 60 hp
Speed: 16
Attack type: area splash
Targets ground
Range: 3 units
Favorite unit: none


Lvl 2:
Dmg; 15 per second (poison damage, 20 seconds)
Hp: 80
Cost: 60 dark
What do you think?

Lvl3:

Dmg: 17 per second (poison damage)
HP: 85
Cost: 90 dark

Lvl 4:
Dmg: 20 per second (lasts only 15 seconds)
Hp: 100 hp
Cost: 120 dark
(Attack speed drops to 14 seconds till next attack)
Lvl 5:
Dmg 250 (2 seconds)
Hp: 130 hp
Cost: 200 dark
Attack speed lowers to (20 seconds till second attack)