I have just built a deck with Dori and Bilbo and weapons and tactics events for Dori, + attachments for Bilbo's defense. That deck is the combat deck and it works a lot, very well, in 2 players, when the other player has a good quester deck, like spirit-Caldara.
I have won easily my first quest-testers, with epic moments include: Journey Anduin: Bilbo defending and Dori defeating enemies like 2 trolls, the Adder, the Uthack... 7th level: Dori defeated a troll Massing Osgiliath: Dori killed .... Witch King! (in only 1 shot)
I was very surprised with those results... I find Dori very versatil: first rounds helping Bilbo while he is building his own tank-machine. And after, he attacks with weapons and KhazadKhazad events, and sometimes helping with centinel, defending enemies from other players.
Another cards to keep Bilbo safe:
First of them: Burning Brand, for sure
And second: Fast Hitchs, of course
Another cards: song mocking, close call, erebor boots, ring mail, gondor shield, half determination
The drawing cards is not problem: Master Forge is awesome here, the same Bilbo helps a lot, Gather, Advice (the other hero is lore Pippin), etc.
Probably the card id like and i dont have is Unexpected or Miruvor for Dori (the other player may play them for him ^^)
In 2 players mode, this is a good combat deck, while the other players plays a good quester deck (as i said) like caldaras decks.