Mestharim (Saga) vs Nightburn (WA5): Should be able to power past Rune Magic's tricks.
Mestharim (Saga) vs Shiego (SO2): Mes' damage is kinda okay almost! BUt only almost. She gets stoned. EDIT: Or not! FREEDOM RUNE. Uh, anyone know how long this one lasts? Though honestly, if it's more than one shot it's probably enough. Rest of Shigeo's offence is VitalityRune bait. If he had just a bit more damage I'd say he could win this because Mes needs to waste so many turns keeping her buffs active, but as is... yeah.
Mestharim (Saga) vs Pahn (S1): Cockatrice.
Mestharim (Saga) vs Gallows (WA3): Cockatrice.
Mestharim (Saga) vs Lo Wen (S2): Hm, if Cockatrice is turn 1, easy win. If it's not, then... I dunno. Mes probably uses VitalityRune to tank out a SL, and wins from there?
Mestharim (Saga) vs Barret (FF7): Thinking Mes' damage is poor enough to give Barret an UNGARMAX, which... actually, may not let him win, Mes just waits for a double (SoulRune, she gets these often enough, puts up WALL RUNE and can tink a limit nicely. If Barret has a L1, she does the same thing to dodge Mindblow.
Mestharim (Saga) vs Cormag (FE7?): Cockatrice.
Mestharim (Saga) vs Adray (SO3): When in doubt, vote against Adray. Fascination probably fucks him up well enough. It's pretty much a race of Fascination lockdown failing twice (assuming Adray MP 2HKO?) vs. PhantasmShot landing something nasty or Mes just killing with damage (helps that she has legal WP-based damage to finish off a close race between these two if necessary).
Mestharim (Saga) vs Cray (BoF4): The status halving makes this tougher than normal, but VitalityRune + GlassShield should stall out anything Cray does and Cockatrice is still turn 3 at worst.
Mestharim (Saga) vs Vesper (SO2): MP kill.
Seifer (FF8) vs Nightburn (WA5): I think. Tanks a limit well enough, and isn't going to see two due to good damage control.
Seifer vs Shiego (SO2)
Seifer vs Pahn (S1)
Seifer vs Gallows (WA3): Gallows isn't the best..
Seifer vs Lo Wen (S2): Should be able to heal and win well enough. Down Rune helps, too.
Seifer vs Barret (FF7): Gets a limit earlier, yeah.
Seifer vs Cormag (FE7?): I think.
Seifer vs Adray (SO3): lulz Adray healing
Seifer vs Cray (BoF4): Cray's defence buffs lead to tinkery.
Seifer vs Vesper (SO2): Yep.
Haar (FE10) vs Nightburn (WA5): Probably doubles.
Haar vs Shiego (SO2): Sure, I'll buy this.
Haar vs Pahn (S1): Counters.
Haar vs Gallows (WA3): Stun.
Haar vs Lo Wen (S2): Stun overwhelms.
Haar vs Barret (FF7): Hammerblow. Barret is quite tanky so he gets his L2 quite easily.
Haar vs Cormag (FE7?): Just barely avoids being doubled, and is probably better from there.
Haar vs Adray (SO3): Allegedly his status doesn't fail. Sure, why not.
Haar vs Cray (BoF4): Yep, I'm buying a Haar double, here.
Haar vs Vesper (SO2)
Mesarthim 8-2
Haar 7-3
Seifer 7-3
This Middle pool is terrible. I don't think any of the three challengers are this great.