Use a bow to stunt Overload champions. The overload shot is automatically applied when you fully draw back the arrow. If you have Point of the Stag, you have a bow that can keep Overload Champions easily stunted while applying a lot of damage on the champion between the stunt opportunities. Also if you’re having a hard time with overload champions stunted on Grandmaster, you have to wait for that thing on their back to flash red to be able to stunt them again. It takes a couple of seconds to be able to restunt Overloads on Grandmaster, so bows are the better option then SMGs since you can actually hold your overload shot on them for that moment when their backs flash white.

[quote]its week 10, after doing all weekly pinacle drops every week and reaching nearly 200 season rank, I'm only light level 1321. overload smg doesn't stun champions even with continuous fire. it feels like after you've stunned them once they get 20s of immunity. normal content like strikes gambit and patrols- the enemies are too underpowered and the guardian can't throw out damage fast enough high end content like empire hunts and nightfalls- enemies are extremely overpowered, your guardians loadout is crippled, and everything feels like I'm hitting it with a pillow[/quote] At 15 drops a week (12 drops from 3x banner counting this week), you’ve had in the ballpark of 160 pinnacle drops on a SINGLE character. You definitely didn’t do every single pinnacle drop.

Stop using a pillow and equip a better loadout.