How important is it that you be able to tackle other Gliscor with Ice Fang? As far as I can tell (which is not very far), Fire Fang would be a better choice because it hits Excadrill harder, 3HKO's Ferrothorn and 3HKO's Forretress after Stealth Rock, and it hits Conkeldurr for the same ammount of damage as Ice Fang. You're giving up 4x SE on Gliscor, dealing NVE damage to Terrakion (who still takes plenty from EQ once it's lost the Air Balloon, which Fire Fang will still cause), and losing any chance of defeating Air Balloon Heatran (who will likely defeat Gliscor 1-on-1 anyway). IMO, it at least deserves a mention.