Not much to say about it. Immovable in it's current form is too OP to not have it on your 2nd bar and too OP when it's on the enemy. Bash should (!be the only skill that could do this!) bypasss Immovable and intrerupt whatever the enemy is doing, either casting a skill or puting down a siege weapon.
Supernico - VR14 DragonKnight - Daggerfall Covenant - Former Emperor
My name is Maximus Decimus Meridius, commander of the Armies of the North, General of the Felix Legions, loyal servant to the true emperor, Marcus Aurelius. Father to a murdered son, husband to a murdered wife. And I will have my vengeance, in this life or the next.