The only way to level the skill line (not individual skills in it, but the main skill line) is to get achievements in the Dungeons section of the achievements window. Not all sub-sections of the Dungeons achivements give Undaunted experience though, I can only confirm the instanced dungeon completions (regular and veteran) give Undaunted XP. You get an equivalent amount of XP based on the achievement points earned (10 points = 10 XP).

I don't think it is possible to fully level this skill at this point, but future dungeons will undoubtedly have achievements that contribute to it.

Psychoke wrote: »

I am veteran rank 10 and I have completed all normal difficulity and veteran difficulity dungeons and i can confirm that rank 4 with 20/200 exp is the highest you can possibly get at this moment

If you complete the Achievements within the Group Dungeons (Damage Dealer, Healer, etc), those award toward the Undaunted. Also, the Achievements within Veteran dungeons, such as killing Winterbourne in Spindleclutch without killing any of his sacrifices awards points.

I confirmed with personally last night: I was 100/150 Rank 3 prior to starting Vet Spindleclutch -- and was 0/200 Rank 4 after completing it, having gained 50 points for getting the Compassionate achievement mentioned.

lbattros_ESO wrote: »

If you have to complete veteran dungeons over and over just to get to level 5, which I assume are hell, not worth the aggravation. That crosses the line from play to work.

No, you don't have to do that at all. You can do any of the daily dungeons on normal mode, or do the daily delve quest that's given by the male orc in the Undaunted enclaves. You can do them on veteran if you want to, but it's not necessary. You get credit for Undaunted when you turn the quests in to the quest-giver at the Undaunted tent.
By the way, when threads are necro'd like this, the mods always close them. Just sayin'.

Jesus, the necro is strong with this one

lbattros_ESO wrote: »

dakhon wrote: »

Actually only the group dungeon and veteran dungeon achievements count for undaunted xp.
Check your achievements tab and you will see them listed.
For normal dungeons,you just have to kill the bosses mentioned in each achievement once,pretty much all along the way to finish them,but sometimes you also have to kill some optional bosses.
For veteran dungeons,there many different achievements,besides killing bosses,like speed completions,killing x number of enemies in a dungeon etc.
In order to reach rank 5,you must complete and repeat the veteran ones a number of times.

If you have to complete veteran dungeons over and over just to get to level 5, which I assume are hell, not worth the aggravation. That crosses the line from play to work.

I'd check for new information. You kind of necro'ed a thread from 4 years ago. Some things have changed in the last 4 years.

Merlin13KAGL wrote: »

(Why don't they close threads after 6 months of inactivity? Clearly they no longer apply, and it's not like existence (or non-existence) of one thread has ever prevented someone from making another.

To be fair, until I read the post mentioning veteran ranks it could have been written a week ago.