Thats my point this plan would take prep, though the symbiot does indeed attack the mind GREATLY, and COULD(not would) be enough to subdue him.
Other than that they are a nuisance.
I really think that spidey should bring a jar of symbiotes or something, to work. With prep this can be done, but without prep, no, not ever. Brock and cleutus are not intelligent, but very clever.
The outcome of this fight can be only one - and i'm afraid it would be near impossible for these 3 to overcome the Hulk...I mean your saying taking advantage of the Hulks schizophrenia would be be possible...Ermm last time I checked Carnage and Venom weren't exactly your average stable minded peeps 😄...So I dont see that one working.