[Snake]

Stillcut

Axe skill. Strike the ground under you while driving yourself off-balance. You will attack all enemies in a 4 range circle. If you do not have Poise active, you will be inflicted with Immobilize until your next round.

Voltiger will make it so the enemies are all pulled towards you for X tiles, and increase the range, but it will not increase the damage.

Unfettering Swing

Axe skill. Requires you to be movement-impaired. Perform a spinning strike, targeting all enemies within 1 range with a basic attack, and then an uprising slash, releasing yourself from any immobilizing effects, and sending earth spikes in the shape of a 4 range star.

Rank 1: 6 FP, 50% Earth ATK, 80% Scaled WPN ATK
Rank 2: 10 FP, 60% Earth ATK, 90% Scaled WPN ATK
Rank 3: 14 FP, 70% Earth ATK, 100% Scaled WPN ATK

Daring Counter

4M+

Axe skill. Raise your axe and spin it mockingly, entering a defensive stance until your next turn while becoming unable to use Offensive Skills or Spells for the duration (Basic Attack and Riposte still work). The maneuver will increase your Evade and Critical Evade (Based on Rank), and make you immune to Flanking.

Every time you are attacked or suffer damage from skills or spells, the Counter Strike's LV is increased by (2 + Rank), or twice as much if you evaded instead.

Once this expires, you will perform a spinning Basic Attack that targets all enemies within 3 range of you, dealing bonus damage equal to LV to the first target hit.

If the LV ends equal or higher than 100, all targets that are hit will be knocked back for 2 tiles and may be inflicted with Knocked Down.

Rank 1: 10 FP, +15 Evade/Crit Evade.
Rank 2: 15 FP, +25 Evade/Crit Evade.
Rank 3: 20 FP, +35 Evade/Crit Evade.

Reckless Cleave

6M+

Axe skill. A powerful, yet reckless swing that leaves both you and the targeted opponent wide open. Target one adjacent enemy and cleave into them like a lawnmower, dealing physical damage of your weapon type which can critically hit.

If you hit, you will reduce their Physical Damage Reduction by 30% until your next round. If you critically hit, you can use this skill again for no momentum or FP cost. (max. 2)

Due to the reckless nature of this attack, you will also randomly receive 25-50% of the damage back as Kickback Damage.

Rank 1: 50 FP, 130% Scaled WPN ATK
Rank 2: 52 FP, 150% Scaled WPN ATK
Rank 3: 54 FP, 170% Scaled WPN ATK

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Alternatively, just make all Duelist skills work with Axes as 'hybrid' clauses (I.E = Sword/Axe for Sidecut, and Polearm/Axe for Sillcut, etc.), which may likely cut most of the necessary extra additions to support axes.

I do not know about the ultimate skill, however. Eclair Lacroix's theme is for a sword swing, and while axes can do it too, it can detract from the weapon's specialty and theme. So just make it be Reckless Cleave as a new skill and call it a day.

Make it M E A T Y and spammable, since it makes that different from Eclair which is a long-lined swing-into-explosion and Lance De Lion, which ignores evade and guard.

Reckless Cleave could be something that ignores natural defenses, while being spammable if you are really lucky, or the opponent does not have the needed Crit Evade to stop it.

[Ray2064]

the on-crit effect would

Definitely be too much
I also think that axe support should be shifted to Ghost with a slight SP crunch to come along with it. It's not like any Kensei or FB will be using those