Northern House-Rules & Practice (Common Knowledge)
-8 potions allowed per duel (one full belt) - [side note]: it is wisest to use full rejuvenation potions
-One opponent must cast the spell 'Guardian' before a duel; and only until the spell dissipates/concludes may the duel begin
-The act of re-equipping items or equipping a new item during a duel is frowned upon because it is known to cause considerable lag (mostly this concerns weapon-swapping during a match, due to a glitch whilst attacking this will cause insta-death for the opponent)
-During a melee vs. melee duel, non-static combat is encouraged. (e.g. swinging opposite ways once in a while to produce & allow intervals of escape, movement, action and/or correction of desync [or async] - a commendable strategy.. An example of correcting desync during a melee vs. melee duel would simply be described as re-engaging your opponent (I.E. pause combat and walk a tile away from your opponent then back again, then resume combat; or, teleport away and teleport/walk back)
-Any
abuse of the 'mana no-stun bug' is an obvious no-no / Including 'Zen
Setup' sorcerers (I.E. using balance, stability & harmony) in
conjunction with one another, which is comparable to the 'mana no
stun-bug' (Especially if zen is used with 100% fast block) - due to the nature of the effect of both of these 'bugs', this basically enables a sorcerer to practically cast spells through stunlock. Though zen is not as bad of a bug, it's still discouraged. You can find an example of this being tested here: https://youtu.be/nRUVGds2nNY
*note*
The use of the 'torch' hack/mod is known to cause major desync/async
issues and even player lag, it is noticeably destructive
Needless to say.. Any use of any exploit, cheat, mod and/or bug etc is a blatant low-blow to your opponent & is considered cheating.