Bullshit.
1. Infinite speed allow user to move instantly everywhere with 0 second, so spatial omnipresent can't do a thing because even if omnipresent character fire attack everywhere infinite speed user can instantly move to every place at the same time, counter every attack at the same time. The only one who can beat infinite speee is Temporal Omnipresent, since they exist across time they can strike infinite users in the past to kill them
2. Immeasurable can be anywhere????. That is infinite speed, Immeasureble speed treat time as distance, they can move through time via sheer speed, so when omnipresent character. They can react to even Temporal Omnipresent, by striking in the past, before they even move to attack in the present, they could well raise their defense in the dawn of creation to defend attacks across time
Let me remind you, Omnipresent is just a state of being, not a speed, their attack speed do not related to their state of being. There could well an omnipresent character with subsonic attack speed. Omnipresent advantage is because they exist everywhere it is hard to affect them totally without range and AoE, and they can attack from all the place at one, but the speed of their strike is something completely unrelated