I think initially you shouldn't ban someone for toxicity but instead give them a mute or temp-ban them for 30min, just to let them cool off. We could give them 3strikes in a 3month period and then consider extending their ban.
I'd also like to add that most people don't read the rules and even more people don't know how to mute people on Skial server or even how to mute people in-game and that muting someone in-game also mutes them in chat.
Excuse me what is 'toxicity'?