FADE

Aura of Endurance: Grants targeted ally Defence+ for x full turns and cures Burn. Restores 2 MP to Thieme.
0MP
Probably the least popular Aura Skill, but can still be of use if Thieme is low on MP and an ally is in need of some extra support. It's also pretty useful early on, curing Burn caused by Shade Eyes and fiery enemies within Mount Firaea.

Stone Splinter: Deals moderate Earth damage to target foe and has a chance to inflict Bleed.
12MP
A solid offensive option for Thieme, especially since his regular attacks are a little lacking. The Bleed effect is especially good on targets with high HP.

Sand in the Wound: Restores some of Thieme's HP and cures Bleed.
6MP
Essentially the same as as his brother, Roth's, Restorative Recharge. Together with Thieme's already big focus on defensive play, this should help keep him standing for even longer.

Stalagmite: Deals more damage to all foes when there are less foes on the battlefield.
15MP
The effect may seem a little contradicting, but it's working as intended. Stalagmite is extremely effective when used on a field with just 2 enemies. It can even be used as a more expensive, but also more powerful single target Skill if you just need that little extra damage.

Towering Senses: Doubles Thieme's Skill for x full turns and evades all attacks while Supersonic is active.
12MP
Towering Senses shines against heavy melee attackers, helping Thieme dodge all incoming attacks for a few turns, and at the same time doubling the chance at which his equippable Aura activates. Note that Towering Senses will not prevent damage dealt by enemy Skills.

Channel Earth: Unlocks two powerful Earth Skills on the next turn.
12MP
The turn after using Channel Earth, Thieme will have his regular Skill list replaced by Channel Earth, which grants him access to Megaton Pounder and Gravelanche. After using either one of these Skills, Thieme regains access to his normal Skill list again.
Megaton Pounder: Slams target foe with immense force.
0MP
An extremely powerful single target Skill.
Gravelanche: A massive rockslide striking all foes.
0MP
A powerful multi target Skill.

Granite Skin: Grants impenetrable defence to Thieme, but renders him unable to move. Drains 2MP per turn while under the effect of Granite Skin.
8MP
While under the effect of Granite Skin, there should be very little, if anything at all, that will be able to harm him. It's excellent to use when you know the enemy is about to strike with a powerful attack to nullify the damage dealt to Thieme. Note that Granite Skin only protects against raw damage, not against Conditions or special effects.

Spiked Floor: Deals low damage to all foes at the end of every turn until the end of battle. Can be cast only once per battle.
12MP
Becomes more effective the longer a battle drags on. This Skill is very efficient when going for more of a defensive playstyle. Note that Spiked Floor won't affect flying enemies.

Blackrock Cannon: Replaces Thieme's weapon with the Blackrock Cannon. Lasts until the end of battle. Can be cast only once per battle.
12MP
Thieme's second Elite Skill, making you choose between this or Spiked Floor. Blackrock Cannon is more powerful than any weapon Thieme can normally wield in the game, making it an excellent offensive option.

Compared to Roth and Eldin, Thieme is a little less versatile. Thieme offers little support to the rest of the party, but is able to take care of himself very well, and he is likely to be the last one standing in tough battles, thanks to his high defences. He's a strategic fighter that requires knowledge about what each enemy does to get the most out of defensive capabilities.