I dunno, I'm of two minds about this. I think there are legitimate reasons to choose either Oathbreakers or IDOME, except for a few cases that clearly break in favour of Oathbreakers. The fact that there are no cases that clearly break toward IDOME, on the other hand, is probably a good indication that IDOME is missing something, even if it's just psychological.
And, honestly, I do think that the problem is largely psychological. The effect of Oathbreakers is something you can see, and not just because there are totally rad-looking ghosts that pop up when you click the skill. You can see the target's health bar going down so much more quickly while it's up. IDOME doesn't offer either kind of satisfaction.
Suggestion 1: IDOME makes the Captain glow faintly. It would be similar to the spotlight effect on our banner, but much dimmer and covering a larger area. No, seriously. Come on, that would be cool.
Suggestion 2: Have it gain an additional bonus when under the effect of certain other Captain skills. Like, say, when In Harm's Way is active, the IDOME aura gives an extra +X/lvl to each stat. And/or, when Last Stand is active, the IDOME aura gains a bonus to Physical and Tactical Mitigation. The idea there is to make IDOME enhance the Captain's other signature skills, rewarding you (and your fellowship!) for playing in a more leading-from-the-front, Defender-of-Middle-Earth style.
That could make IDOME nifty enough to be a solid choice without unseating either of the skills it's fighting for a slot with.
Cainwen Ciaphas, Captain of Crickhollow, HERO OF MIDDLE EARTH!!!
I will not be pushed, filed, stamped, indexed, briefed, debriefed, or numbered! My opinions are my own!