The situation is as follows: I've surrounded an enemy SC with 3 units able to move or support there, while the enemy has a unit in the SC, one adjacent, and one adjacent to one of the units I'd use to support, but not adjacent to the SC itself. I'm assuming he'll use the third unit to tap mine, thereby making it 2 on 2, which is why I want to use the unit I'm expecting him to tap for tapping rather than supporting. That way, with me tapping his supporting unit, it should hopefully be 2 vs 1 and get me the SC. However, for contingency, I'm supporting another power into the space I'm tapping from from another external space, and I've run into some pretty weird situations wrt supporting others into my own held spaces before. Will this work? Will it void the tap I ordered?