A single Phoenix can clear out an entire respawn on the 2nd front.
It's interesting how you'd even take a Dwarf Cottage for 10 or 15 with 1 Phoenix, an Imp Cottage for 40 or 60, or a mini Medusa Hut :confused:
What armies can a Phoenix beat? Even a pre-maximum Crypt will be a problem
Hordes of level 1 monsters (Gnolls, Marauders, Centaurs, Halberdiers or Pikemen, Battle Skeletons) and so on.
Shooters of level 2 and above, a horde of Zombies will be a problem.