TrailHead says:
VagueGM, what do you suggest I roll for
this?
What are you trying to do? There are elements in there of attacking, but also elements of trying to get the attention back on yourself. What you roll depends on what your goal is.
Attacking would be the normal attack stats (STR or DEX?). But you know that your weapons are not likely to be very effective.
Surviving the return attack could be +CON or +DEX (depending on how you are doing it).
Getting the attention away from your companions and back on yourself sounds like +CHA. But a very easy (almost too easy to need a roll) +WIS might tell you that, since
their apparent goal is to prevent people from leaving (they did not attack before, for some reason), the chances of getting them to give up on everyone else is slim.
If you want to roll +WIS you may learn something, there may be something (important? who can say) that you can pick up from their reaction to your attempt, but you will leave yourself vulnerable.