I have a nutty idea but hear me out what if Sanford and Deimos were playable by using a switch mechanic similar to bloodstain or castlevania 3 but they share the same health but in a unique way where Sanford has 3 hit points and Deimos has two hit points so if one gets taken down the player will automaticly switch to the other and both have their own unique ability.
Deimos will use knife attacks as primary and will use guns as a secondary but each fire arm will have four shots like Pico minus the auto aim and will start with the pistol but will passively get other guns like hank such as the burst fire smg, shotgun, and grenade launcher (and yes I am thinking of the ones from madness interactive game) and if Sanford goes down then the switch button changes to a parry like hanks making him a glass cannon but it could drain his ammo quickly due to it being limited.
Sanford will use his meat hook as primary and for secondary it'll be similar to son's chain but will be very different to where if Sanford use it mid air it'll pull him towards who or whatever it catches like he did in one of the episodes when he went up against a bunch of soldat's until they had to get Hank providing extra mobility and if Deimos goes down the switch button will change to the firearm button that functions as Deimos's secondary with the difference being that the pistol will change to the revolver but will function the same until Deimos is revived will be passed to him and vis versa making him a versatile fighter.
Now for the rush ability I am actually not sure I was thinking maybe it would be one of the power ups from the madness interactive game perhaps there would be an extra round in the guns before being discarded or reloaded if your using the pistol I am open to what other people may think and i hope you have an awesome day