Which cross class abilities should i get for Machinist?

[Tsilyi]

my guess is mcn wont get ss due to it's own temporary "damage up" and "guaranteed crit" abilities. such as the information we have stands, we can only really speculate. we'll know at the end of next week for sure, obviously. personally, as someone who's going to main mcn, i'd prefer not to have to use straight shot.

[Zophar]

my guess is mcn wont get ss due to it's own temporary "damage up" and "guaranteed crit" abilities.

I would disagree with this assessment, unless they plan on removing it as a cross class ability all together, as they did with thunder, but I don't see it as being game breaking enough to do that. Up to this point, they have never excluded a class/job from a CC ability, that other similar classes/jobs have access too. The only criteria I've seen is that magical classes/jobs, do not get to have physical offensive abilities, such as Skull Sunder, Savage Blade, Straight Shot, Feint, and Haymaker. Mercy Stroke is an exception, but maybe it's because the move itself doesn't seem to utilize your weapon? Idk. And likewise, Physical classes/jobs don't get magical offensive abilities, such as Aero, Blizzard II, and Ruin. Unless I have completely overlooked something, no cross class ability, up to this point, has ever fallen outside the above criteria.