Not to mention the very elementar use of phantom-stack: cast phantom on a high speed high velocity flier, like the griffin, and in no time you can reach the most dangerous enemy shooter stack, thus forcing it to act melee vs. your phantom unit and losing it's valuable turn, or moving away from it. Next turn, they are cannoneer food (or spell food, whichever comes handy).
At the moment, i am using Pahntom mostly on my shamans to cast it's two totems, especially the healing totem right behind my rangers. One extra healing totem saves for me tons of mana on resurrecting that 1 or 2 killed Inquisitors. The other one, the Death totem can soak one enemy attack, no matter how weak it is or how powerful the enemy stack is. Istill need that Sacrifice spell
Though, yesterday i found a new spell: Doom
It is very interesting to use