Keep in mind that spirits attack from longbow range.
The Glacial Griffon has no healing skills, it does have natural health regeneration though. Quick-activating health degeneration skills and kiting are your best bets.
Spoil Victor is effective against the Glacial Griffon.
Knockdowns and/or interrupts reduce its offensive abilities greatly, both by preventing the spirit from spawning and by preventing it from recharging quickly due to Ritual Lord.
