Just because you're UD doesn't mean you can necro a thread :)
In my experience, spells and ops don't give even 1 point of honor unless in war - and typically the highest honor-gaining spells (since UD, you have no ops) aren't available outside of unfriendly/hostile anyway. I'd recommend just making an attack on someone in NW/land range with comparable honor. You probably want the elite conversions anyway.