With the recent patch (1.120.254385.0), the EAster mission has a wierd count bug.
Every time you use an ability, the mission counts a plant, even if you don't have any eggs.
Now how to get unlimited VP?
1. Apply atleast 3 points to as many abilities as you can, and remove all other items (keep 1 weapon on):
2. Equip the "Festive Egg Plant" mission:
3. Now activate the abilities, do not throw granade spam:
4. Repeat the ability spam once they reload. Or suicide to skip the reload time.
Result:
Now repeat the whole progress from step 2.
After you're done with farming, reset your abilites and hot bar to how it was before.