When the enemy is attacking your statue (i mean when the shadows/spearatons are attacking your statue) you must :
- Castle Airs Level 3
- Use at less 20 water elemental & 15 earth & the Infernos with his abilities.
also, you can attack with your miners, (miners of elemental of course :P)
If you have all this you can beat the ninja/spearaton massers verry easy