I tried playing the multiplayer game about 2 weeks ago. I really don't know how to effectively assassinate my opponent's magikill, Merics, or Speartons. Everytime I try to attack with my ninjas, they always reappear from the cloak about ten feet away from my opponents army(much earlier than it usually does when it attacks) and the ninjas don't have the chance to poison anything. I lost games because my ninjas failed me :( . I think Shadowwraths hate me.

Because they go really slow when you put them in shinobi, I target the enemy, and when I get close (or get in range of projectiles), THEN I use the ability. Then either keep on attacking or run away and let the ability recharge.