It also depends if you got seasonal gear on (with the blue little icon in the top left corner) Or you have to go up to a higher level. I usually start with no hub and no ammo. That boosts without making enemies a higher level. Then if needed a +10. If you need a +20 start with one of the Roman number modifiers with screebs and shroud and stuff like that. But the grind after 400 is horrible. You can also wait until next episode because then all hard work will be undone and then it shifts to 500 until 550. It is just so bad without any guaranteed weekly pinnacles besides a chance that Bungie controls. It’s not a percentage because I never seen 2 pinnacles drop within a few activities. You need to run like 20 before another pinnacle drops again.