There is a fansite which can show datas from Warframe API. https://wf.poedb.tw/us/item.php?c=Weapons&slot=5
When i checked the datas of Stropha and other Gunblades, i found a weird thing.
This picture shows the parameters of combo for Normal Attack
Next picture shows the parameters of combo for Gunshot Attack
Maybe this difference can explain why Redeemer Prime gets 5 combo counter increment for each enemy hit by Gunshot.And it can also explain why why Stropha have a weird damage of Heavy Attack.
So according to that, shots only go up to 6x on a 180 combo?
As if the weapon wasn't already weird enough, lol. But I do feel like I definitely did a lot more than a 0.5 multiplier with a heavy attack efficiency build, its probably worth taking another look at the damage values
So, Stropha also gets 5 combo per enemy hit with the shot, and it looks like the full 12x multiplier is used. I did 33600 with a 220 combo/12x multiplier which is exactly 12x the 2800 damage that is not displayed anywhere ingame.
The probably have the 'usual gunblade shots' still hooked up to the weapon, but made it shoot no bullets and instead spawn the damaging wave, which results in the UI being confused as to what damage value to display.
I tested the Heavy Attack of Stropha and Redeemer Prime.Both base Heavy Attack damage are actually equal to 4 x Gunshot damage(3200 for Redeemer Prime),not 5 x Normal Attack damage(1060 for Redeemer Prime).
This must be a bug for Gunblades.And we don't know what caused this bug when DE fixed Stropha.
For those parameters, I think maybe there are 2 combo counter for Gunblades, one for Normal Attack, another for Gunshot.
For Normal Attack, each hit can give 1 combo increment, and it always needs 20 combo for reaching next tier.
For Gunshot, each hit can give 0.5 combo increment, and it always needs 15 combo for reaching next tier.
For two counters,there are some converting functions to calculate the actual combo.If it is 200 combos in Normal Attack, it will be 150 combos in Gunshot.
I've tried a lot of different weapon types against lvl 1 drones, and the only weapons ouside of full-auto and Beam weapons that worked were the slower burst weapons like Kuva Hind or Akarius, but well, that isn't really a single hit.
In my experience Shotguns and fast Burst weapons like Quatz still needed 2 shot/bursts, no matter how much multishot you have.
But I won't count out Host/Client problems and lag possibly helping in getting around shield gating.