Actually, I haven't tried this to make sure it works (like Keburi no Double Crop, the theory is sound and there is no reason why it wouldn't, but it's just such an awesome mental image that the "surely there must be some sort of catch" reflex is kicking in until I see it for myself anyway) but Shoguns' class skill allows them to equip a second weapon, meaning if you start as a Shogun, sub Arbalist, and take Bolt Mastery to unlock the equipping option, you can theoretically dual-wield those monstrosities.
But yeah, common consensus among GameFAQs posters at least is that Shoguns are just plain better than Yggdroids as far as bonus classes, but I stand by my decision because A) I already had my party figured out and thus both were equally useless to me, B) New Game Plus lets you go the other route and thus end up getting them both on the second go anyway, and C) following my heart plotwise just happened to lead me down the road that just happened to give me Yggdroids, so whatever.
Like many people in my back bench that I thought were just completely useless (but I may as well keep them Combat Studying anyway because why not,) Mantis will be overlooked for most of the actual main game but his... highly situational abilities may actually be useful for some specific encounters. I already know there's a sea quest with a fight whose conditional drop involves killing it with a blow that does over 5,000 damage, for example. Without having actually tried it, I am guessing the easiest way to get that would probably be to take in an Yggdroid with just enough HP to survive one tick of Overheat, then turn 1 Core Dump, turn 2 HP Cannon.
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But yeah, common consensus among GameFAQs posters at least is that Shoguns are just plain better than Yggdroids as far as bonus classes, but I stand by my decision because A) I already had my party figured out and thus both were equally useless to me, B) New Game Plus lets you go the other route and thus end up getting them both on the second go anyway, and C) following my heart plotwise just happened to lead me down the road that just happened to give me Yggdroids, so whatever.
Like many people in my back bench that I thought were just completely useless (but I may as well keep them Combat Studying anyway because why not,) Mantis will be overlooked for most of the actual main game but his... highly situational abilities may actually be useful for some specific encounters. I already know there's a sea quest with a fight whose conditional drop involves killing it with a blow that does over 5,000 damage, for example. Without having actually tried it, I am guessing the easiest way to get that would probably be to take in an Yggdroid with just enough HP to survive one tick of Overheat, then turn 1 Core Dump, turn 2 HP Cannon.