So Ulgu Tongs is dead, RIP. I can still see the knowledge being useful, maybe Damsels or some other magic users elsewhere use the method and it could help understand what they are doing, but certainly we and the colleges won't be using it sadly.
I do have another idea though. IIRC, once Ulgu is used to cast a spell it is no longer Ulgu, having been changed by the caster. Would it be possible to create a spell specifically for creating/transforming Ulgu into a controllable aetheric substance akin to Ulgu, which acts like Ulgu, but which doesn't repel other Winds (or does so to a lesser extent)?
Then one could use this spell matter to control other Winds, creating the cage as described in the update without the proximity of the cage driving the captures Winds crazy. A sort of Spell Tongs.