MCH completely useless

[RiceisNice]

...

Then you need to factor that machinist's weapon damage stats are in the low values similar to bard; a white mage in cleric stance has better scaling than this with a 170 potency.

Gauss Barrel is a dps loss if you keep it beyond the intial burst. Using round/ricochet off cooldown assumes that you're keeping it on for the entire fight.

Half those buffs aren't exclusive to machinist, nor would any decent one would use it to buff split shot exclusively if that is what you're getting at.

The problem I see is with machinist (aside from me lagging behind compared to other dps classes) is that I always find myself busting my ass (aligning cooldowns, pre pull burst, pots, all of that) just to get under them in dps, and some of our burst straight up does't apply unless you make adjustments (meaning lower it's overall damage) because some vulnerability phases simply do not last long enough for wildfire (neverreap's first boss and bismarack EX come to mind). I never find myself using gauss barrel outside of burst or AoE because the auto attack loss isn't made up with the increased damage or the two skills. And the only time I do use it again after the initial burst is either in combination with my cooldowns (which I'm sure is a bug with rapid fire making GB instant cast), or when there is signifcant downtime where I can't attack the boss...and use it for burst.