What if he is sending spirits to attack you as he is on the other side of the city.
... Or doing ritual magic to you?
[The Last Starfighter]
Kodan Officer: She won't answer the helm! We're locked into the moon's gravitational pull. What do we do?
[sound of Lord Kril's eyepiece swinging over left eye]
Lord Kril: We die. Yeah, you kind of hope the mage gets tired due to drain and stops attacking.
If you don't have the hardware to go up against spirits, your pretty much doomed - run away quickly, best in a vehicle since spirits don't move that fast in the material world and you will at least force them into Astral to keep up at some points. And head for any toxic zone, mana ebb, domain or mana warp you know of to weaken the spirit.
Defeat the 'targeting' the spirits are using. If the mage knows what you look like, change that, and try to blend with a crowd. Same really if they are using an astral sig - get with other people and make it hard to assence you from the mass of people.
That kind of assumes you take out at least one spirit and have the chance to move/hide, etc.
Sending a spirit out past (Magic X 100 meters) is a remote service - that means the mage can sent them, but unless the spirit is bound the mage won't be able to change whatever the initial orders are for that spirit (because it uses all remaining servers for unbound spirits). That may not matter if its "kill them all" or the like, but potentially that might provide a loophole.