Aleykum selam,

i dont know what you mean by

if opnick* iswm $nick

to be honest, i didnt understand all your description

the $opnick identifier will only receive a value on the "on op/op deop" event, which means the $opnick its the nick who received op or who was op removed

so you can use

if ($nick isop $chan) { command } 

you need a check, to check if the person who is running the code is op on channel to set ban
i will not give an example of $regex, based on your script, cause it will confuse you