You can get up to 600 score from building + 300 score from healing, you will get 100 (or more) score for the fact you cleared it and that leaves just 300 more score (or more) you need to get, which is simplest to dps the boss, and you got yourself max prime war pro mode rewards :) Also nightmare prime war pass if you didn't have it yet This approach can be applied to any of the prime wars
You can get up to 600 score from building + 300 score from healing, you will get 100 (or more) score for the fact you cleared it and that leaves just 300 more score (or more) you need to get, which is simplest to dps the boss, and you got yourself max prime war pro mode rewards :)
Also nightmare prime war pass if you didn't have it yet
This approach can be applied to any of the prime wars