New DE Troops: martyr, zealot, and/or crusader
All of these troops are strong, normal troops but trigger a special ability at death.
Martyr:
DE cost: 25
HP: 100
DPS: 25
Speed: 16
Housing: 12 spaces
Ability: Upon death, the martyr's corpse becomes the center of a level N heal spell (where N is the level of the martyr)
Zealot:
DE cost: 60
HP: 250
DPS: 45
Speed: 24
Housing: 15 spaces
Ability: Upon death, the zealot's corpse becomes the center of a level N Rage spell (where N is the level of the zealot)
Crusader:
DE cost: 250
HP: 1200
DPS: 65
Speed: 12
Housing: 20 spaces
Ability: Upon death, the crusader continues fighting for (3+N) seconds and continues to draw fire from defense buildings (where N is the level of the crusader).
(alternate ability for the crusader: is that he absorbs 20% of the damage his allies around him take. Maybe bump up the hit points if this would be his ability)