Strategies:-
The Liche is basically a GA support and IRBM Counter unit. Using its GA only weapon, it can defend other units and counter the deadly nuke with its special ability, IRBM Defense. Though it isn't very fast, it can hurl rockets into the sky, gunning down enemy air forces flying over head.

IRBM Counter:-
IRBM Counter is pretty simple. Wait and listen carefully to the nuke siren. The nuke usually strikes its target 5 seconds after the siren is sounded. Immediately after the nuke sirens die down, you have to determine which place the nukes will strike. Launching the Defense system will create a mushroom like web that will soften the nuke, making it do lesser damage. However these mushrooms will occasionally close and spring back up again, if you are unlucky, the nuke may hit just when the mushroom closes, then, your unit will take the full damage of the nuke.