It is also completely unrelated to the meaning of the Force (Balance) sphere.
I prefer simply allowing Siege units to get Mobility I and Commando, bringing back the old Velox Workshop Luchuirp UB, and allowing old Golems to be retrofitted in buildings with the Golem UBs.
Temperance (a spell giving a promotion of the same name, which gives resistance to both Holy and Unholy damage) is a much more appropriate Force I spell.