Dragon Quest VIII - Don Mole (Low Level, No Armour, No Shop, No Monster)

get some help,
this is dragon quest 8 low level run with additional restriction : no armour, no shop, no monster
rule :
Low Level : the level will as low as i can beat the boss without relying absurd low RNG near to impossible,
no armour : self explanatory, no shield, no armour, no accesory, only weapon
no shop : shop like weapon store, armour store, general store is forbidden. but casino and unusual shop like that lady who sold herb before khalamari fight is allowed.
no monster : self explanatory, we won't use any monster to deal damage or OP meat shield.
seed is allowed to lower the level gained even you can't do standard low level without seed lul.
i don't have many choice here. even defending strat like this doesn't guarantee win. for example if hero is the last man standing. it absolutely 100% you can't win, it require ton of luck to get don mole poisoned, all of his minion get confused and not attacking the entire time, and the last is when don mole fall his minion should be lower than 3. even you can't win against 3 don mole minion let alone fighting don mole and his minion with conventional method. probably i may missing something here that makes this battle possible without poison. considering that after this boss i can loot of treasure (pun intended). i'll just want to skip this boss.