What Ermac infs? He has relaunch combo semi infinites and 100%s that have to stop eventually based on move properties. The reason for multiple Stryker and Kung Lao infs is because there are variations of their infs that make them different. Technically, Stryker has a corner inf, but the cross screen inf if done properly can go from one side, then out to the other, similar to Kung's, that's another true inf. Semi infs are ones that are unbreakable until they hit the wall, but in many cases can finish the opponent before they get there.