Generally, when such conflicts exist, if someone has made their four contacts, they will defer to the person who does not have four contacts. In some cases, we each share contacts (especially if we know each other). I once activated and had a short period of time to do it (less than ten minutes). Somebody I was mentoring, unbeknownst to me, was activating a nearby summit at the same time. Once we did our S2S, i acted as net control, and we each got our 4+ contacts in under ten minutes. Once there was two other activations going on at the same time and I had interference locally on .520, so I simply moved over HF and let the other two activators work on .520 given that the local interference I had was not heard by them.