Warrior vs Swordmaster: One point that kept being brought up is the "useful passives of Warrior" that you're losing when you use Swordmaster instead and I have to respectfully disagree. too much from Warrior to Swordmaster
Enhanced Normal Attack is only worth caring about on a couple characters, it's true. (Iku, Mamizou, perhaps overheaters as it DOES work, Flan for randoms sometimes) Similarly, Row Attack is only worth caring about on a few characters, but you seem to have underestimated it, so I'll cover that too-
Orin and Ran's (and arguably Yuyuko's) -best attacks- are already their row attacks. Giving them warrior effectively increases their damage output by 30% flat, before accounting for the ATK buff. It also brings Kogasa's and Alice's (now that she ignores 40% mnd/def-it's not even a corridor skill!) up to par as a "best attack", and makes attack-Komachi's significantly more potent of an option versus spirit-resistant bosses (of which there's plenty...). Hina and Yukari certainly aren't always using their gimmick attacks and their next bests are easily their row skills.
And 30% damage is quite a nice chunk to have... ontop of Tension Up. So yeah. Enhanced Row Attack is very useful on many characters. I included magic-users in here because it's pretty much the same with the magic class, even if it has arguably more useful damage skills. (Sorceror's row enhance also lets Penetrator become strong enough to use as a legit damaging skill, but not quite as much in Archmage- for elemental roulette maybe, barely...)
Past those character-specific cases, I'd say Tension Up is a -very- useful skill. Yes, I have lots of buffers. However, I'm not buffing them every turn. Tension Up effectively makes their buffs decay MUCH slower, which translates into a non-trivial amount of extra damage that easily beats out the extra base stats on swordmaster/archmage. Yuuka can go without, but most people with passive buff upkeep only want it more because it practically makes them self-sufficient; majesty+tension up means 14% passive buffs and if you have a strategist out I believe that sets you up for permanent +100% buffs.
And since Tension up applies the buff WHEN you take your next turn, not on the attack, you ACTUALLY end up with higher buffs. Instead of being at 80% when you take the first turn after having been buffed to 100%, you have 88%- or 94% with majesty, for example, or flat-out 100 instead of 84%(?) via strategist. And you have more much buffs the second and third time as well, after which you're liable to be looking at getting rebuffed to keep everything high and top off the offense again.
So yeah, I highly value Tension Up.
Minoriko and Wriggle: I think you're vastly over valuing her Infinite Corridor regen skill. I'm pretty sure in any serious boss fight, Minoriko is going to get way more than 25 turns and after that point, the passive is useless. Unless I'm misunderstanding the skill.
What? No. Healing up to 150% doesn't mean after 150% is regened over the battle she stops regenerating. It means she can Hourai Elixir herself slowly. Not the most amazing, but it earns you extra HP when the boss isn't using alltarget attacks (or targetting Minoriko's high mind). If you think I'm overvaluing it, well, people seem to REALLY love Komachi as an HP tank. I haven't tried it personally, but apparently max hp + regen = insane?
Minoriko's max HP isn't as compelling as Komachi but she totals +16% base regen instead of 10% and hp tweaking is surprisingly effective postgame to fix hers, her regen overheals some, is notably faster than Komachi to regen more, and boasts intense hp/mp recovery abilities (Desire to Rest, Emergency Recovery/Charge and her boosted Owotoshi Harvester) and passively buffs the front's MAG.
And most importantly, she actually has a fairly high MND. That's what actually makes this work. Really, she only needs the cushion and big recovery versus defense-targetting attacks. It depends how hard you go in on stat balance with equip/levels on HP versus MND, but that'll depend on the layout of the boss you're fighting- mostly magic, you'll dump your levels in mind, vice versa, etc.
This was also part of the idea behind Satori; if she's an enhancer she can keep her own HP going while supporting or damagerushing. (Also, I think you can easily get Satori 50~60+ max mp with second boost and high levels and most people don't super need those MP gems, and instant attackers let her really abuse small mp recovery, but in any case that gimmick is highly dependant on hp scaling.) She can potentially use normal support skills and deal a halfdecent amount of damage and just damage burst sometimes, but, we'll really just have to see how damage vs hp scales to tell whether it's worth caring about. She might be better off pairing with the full Earth Spirits team and continuing to copy people's attack skills if she wants damage, since that team skill will be OP endgame.
(it's nice to hear healing hp tanks isn't so bad, though, and lends more value to keeping Minoriko/Sanae in postgame if you use Komachi or hp-build Renko, etc. It'd be hard if you were just using Reimu/Maribel/maybe even Rumia) (HP Build Renko has serious potential tho because maintennance+easygoing+12% hp regen with Maribel.)
And I don't know why Wriggle is getting a bad rap as a tank, she has the second tankiest character on my team behind Komachi. With excellent Ailment Resistances, she's free to focus equips on buffing DEF, MND and fixing her Elemental Resistances. Even if I take off Divine Barrier, she still has the highest DEF and MND stats of the party and everyone that's supposed to take hits has the same library levels, with similar focuses on having well rounded resistances.
I'm just looking at base stats. Wriggle has good levels and cheap library, which definitely helps, but her base is only 8.8. Theoretically a -ton- of people can be tankier than this. NOW, YES, those are not half bad stats at all and you can totally do some tanking, but they're not particularly good either. Once you add in Team 9 bonuses it gets better, though. In postgame with either All By Myself or Proof of Kinship it gets a -lot- better, and +25% with poison on makes her potentially -amazing-, though. Poison Touch functioning helps a bit as well to help keep poison actually up.
I don't really have to worry about "Equipping for resistances" anyway since stuff like War Mask of the Butcher does both and I try to give tanks a Star of Elendil for all that sweet elemental affinity. Wriggle's ailment resistance is definitely an upside though- give her a tome of ailment resistance and she's nigh-immune across the board.
edit:ORIN and ran's best attacks are row attacks. ORIN. NOT CHEN. AUUUUG HCATGIRLS