The Myrmidarch Magus archetype gets the Fighter weapon training class feature
At 6th level, a myrmidarch gains weapon training, as the fighter ability, adding an additional weapon group every six levels after 6th (to a maximum of three groups at 18th level) and increasing the bonus on attack and damage rolls for weapon groups already chosen by +1.
This ability replaces the magus arcana normally gained at 6th, 12th, and 18th levels.
Now I am confident the class can take the Advanced Weapon Training feat
But what I want to know is, can the Myrmidarch forgo an additional weapon group at 12th or 18th level to instead select an Advanced Weapon Training
Beginning at 9th level, instead of selecting an additional fighter weapon group, a fighter can choose an advanced weapon training option (see Advanced Weapon Training below) for one fighter weapon group that he previously selected with the weapon training class feature.
I don’t see why they couldn’t do that too. It’s the same as weapon training, except the progression is slower.
They can also take the Fighter VMC and be more Fighter than Fighter.
"Beginning at 9th level, instead of selecting an additional fighter weapon group, a fighter can choose an advanced weapon training option" A Myrmidarch counts as a Fighter "for the purpose of qualifying for feats", but the ability to chose an AWT isntead of an additional weapon group is a general rule, not a feat - a Myrmidarch it isn't a Fighter for such things, and thus can't benefit from that option.
The feat is good to go at 8th+ level, because it's a feat and thus affected by the Fighter Training class feature.
You gain weapon training as a fighter though. So it should be good. I could swear there’s even a dev post to that effect.
They can also take the Fighter VMC and be more Fighter than Fighter.
I like this.
Weapon Training 1 @ 6 from Magus, 2 @ 11 via VMC, 3 @ 12 from Magus, 4 @ 18 from Magus, and Weapon Training 5 @ 19 from VMC.
Armor Training 1 @ 7 from VMC, Armor Training 2 @ 8 via Magus, 3 @ 14 from Magus, 4 @ 15 from VMC.
That's fun.