How could you update the Invite && Exception list of the channel?
You'll update mIRCs internal lists (e.g. to handle with scripts bans / excepts etc that had been set before you joined the channel) with these commands:
ban list (ibl): /mode #channel +b
ban exceptions list (iel): /mode #channel +e
invite list (iil): /mode #channel +I
RAWS - does that raws need to be updated first or not?
The raws mentioned are just the server's replies to these commands. mIRC is updating it's internal lists when receiving the raw replies.
You could halt the display
of the raw replies with a script (using the "haltdef" command).