I do think Kirby is one of our best team partners. I wrote a lot about it way back when, but we have multiple infinites with Kirby, the double fruits are super useful, especially since key is an excellent "Get off my partner" tool and punisher. He also benefits very strongly from hydrants and trampolines, can help with setups, can kill, etc.
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That said, I did play with a Powersuit Samus player the other day that helped me realize something: We do not need to be the ranged one. We have decent offense, with the problem being that we are negative on block. With a partner backing you up, that is no longer a real issue.
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Also I know how to keep an eye on my hydrant, so I found it really useful to just put the hydrant down in front of my partner, take point, and let my partner launch the hydrant. Worst case scenario I also take the hit, but if I take the hit along with one of them, I break even. If it hits me and the other two, that's a win for my team.
I would suggest in general always using key in teams though to punish anyone for hitting your partner.
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Also I do agree that it is important to have a teammate who can kill easily. While we do have jank setups, it's harder in teams for us to get reliable kill options, and TBH it should not be our role in the team. We can fill in as stock tank, as support, as point character, and to a certain stage control even in doubles, but reliably killing is not going to be our strong point in a 2v2 scenario.
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Also I do feel Pacman is very strong in a 1v2 scenario.
Though this is mostly for fun but double Pac-Man can be extremely fun. It can probably be shut down hard though.
I actually think this is a legit team WHEN you know either A) The opponent's team is way better than yours or B) You are teaming with someone new.
Double Pacman is pure and utter chaos, and it completely destroys team synergy. If your team for some reason lacks that synergy, or the opponent's is better, it kind of brings them down to your level by essentially playing a "hazards on" game. It is really hard to team combo anything with trampolines and hydrants everywhere.