Guild Wars 2

The longer your pet stays alive, the more benefits you and the pet stack.
This depends on the class of pet.

For Ranger:
Every X seconds a pet is alive after activation, the ranger receives 10 stat pts of the assigned primary stat of the pet class (power, precision, toughness, vitality, healing power would be tied to a class of pet). Then for the other 4 classes of pets (10 total max for land and amphib) you would add 1/2% to condition duration, boon duration, critical damage and pet stats). Up to15 stacks without a trait (like Spotter) and 30 with master’s bond.

Would really buff the ranger right up until the point that they kill the pet in combat making us very much front loaded.

For Pet:
Every 10 seconds a pet is in combat and stays alive ALL of its stats increase by 20 (1/2 of master’s bond) and really helps in larger fights with multiple targets/allies. [Tell me if the time/amount makes sense in PvE as I don’t focus on that]. Master’s bond would increase the stat increase per “tick” to 40 and would be more useful in small fights. Resets after you leave combat or the pet goes down. This would encourage you to keep your pet alive in a zerg type environment and would help you add value in boss fights.

I’m sure the numbers could be tweaked, but what about the idea?