They're both solid champs, and both perfectly complimentary to have on the same team. In all honesty, it's hard to say which should be booked first - posting your roster could help. My gut feeling is Jorrg, because at very least, he's basically irreplaceable for Faction Wars, but if you have other support champs, his utility may be diminished.
UDK does a lot towards keeping your team alive through what would otherwise be the most dangerous stuff - the big single-target hits. So, with that in mind, I think I'll now suggest you go with HK first - but only to book her A2. If you're lucky, you'll get it on your first book.
Also - bring Tyrant to 60 ASAP. He'll help you hugely. He's one of the best lego champs in the game for dungeon farming, and he can solo farm Spider 20 and IG 20. Your team will eventually become HK, Jorrg, Tyrant, UDK, Kael.
So the team has changed quite a bit recently. Now I am really lost as who to team with whom on my main raid team. Any advice for any teams would be welcome. I know that Magnarr works well with a burn specialist. I am not sure if Djamarsa and Cold heart would be changed out for some of my main champions on the main team though. Which is: High Khatun, Old Hermit Jorrg, Tyrant Ixlimor, UDK and Kael or even if Warmaiden should be put in one of their places.
Dragon:
Ice Golem:
FK:
Spider:
Thanks again Kramaswamy.kr 😀