/loadbot
Find LOH. E.g., if it says: heal0=Lay on Hands
The add to your server_char.ini under [MQ2Bot] an entry to disable it: HealIf0=0
Save file.
/loadbot
For stuns, they show up as nukes, so you can do the same, e.g. to disable Nuke1, add NukeIf1=0 - that's if you want to disable any of the stuns.
To control stun, here is an example entry for your nukes:
NukeIf=${If[${Target.ID} && ${Target.AggroHolder.ID}!=${Me.ID},1,0]}
Once you have the entries the way you want and save the ini, in game do /loadbot