u/Girros76

Crits Stun + Stuns give Ability recharge + Rewind + 2 Turret items + One poor Ramok = Six minutes of unadulterated pleasure

(Bossfight begins at 2:20)

[Edit: My confusion likely stems from the sentries (specifically, their placement counting) being bugged, so this technically is also a Bug Report]

UPDATE: I've played another game, also with the Jumble alteration, but this time as Spotter. I could place two sentries in the second, third and last floor, All on the elevator/boss arena. In the boss arena I took a normal resupply and tried to place a third, I couldn't. However, those two sentries were the only ones that expired due to running out of ammo, and once they did I could place two more. This would indicate that the cap is 2 simultaneously per level, however I could place 4 when playing as Retcon, so that can't be it. My logical conclusion is that the issue probably is that there may be a 6 sentries total cap, and sentries that still have ammo remaining when you leave the floor are not discounted due to a bug/oversight.

They have 2 "ammo" by default, so 1 per resupply. But they also seem to have a sentry cap that doesn't seem to be displayed anywhere.

I picked it as Retcon, I once place four of them in the same spot (next to elev), but in the next floor I could only place two, and in the last floor (boss) I couldn't place any.

Is the maximum number of sentries 6 for the entire run? Resupplies didn't seem to let me place more, and it doesn't seem to reset by floor. Is there any way to "clear" sentries so I can place more later?

I'd like more information about this, but neither the wiki nor the game could provide it to me.

Also, as a QoL suggestion: if there is a maximum sentry cap, no matter of which kind, I think it should be displayed somewhere in the HUD (e.g. "Total sentries left: X")