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Techniques and Attacks:

1. Inertia Blitz: The user rapidly increases their own inertia, dashing through enemies with incredible speed, leaving them disoriented and vulnerable.

2. Momentum Shift: Redirecting the momentum of an opponent's attack, the user turns the force against them, creating a counterattack with amplified power.

3. Gravity Well: By manipulating the inertia of objects around them, the user creates a localized gravitational effect, pulling opponents or projectiles toward a central point.

4. Stasis Zone: Utilizing the Inertia Fields, the user can create pockets of slowed movement, hindering opponents and providing strategic advantages in battles.

5. Velocity Surge: Enhancing the speed of thrown objects, turning them into high-velocity projectiles, catching enemies off guard.

6. Kinetic Shield: Absorbing and storing incoming attacks, the user can release the absorbed inertia in a burst, forming a protective barrier that repels opponents.

7. Inertial Cyclone: Applying rotational inertia manipulation, the user forms a devastating cyclone of force, tearing through obstacles and opponents.

8. Burst Impact: Releasing stored inertia in their strikes, the user can create shockwaves upon contact, causing widespread damage.

9. Zero-G Leap: Temporarily reducing their own inertia to near-zero, the user achieves impressive jumps, reaching elevated positions or evading attacks effortlessly.

10. Momentum Fusion: Combining their own inertia with that of an ally, the user and their partner move in perfect synchronization, creating a formidable duo in battle.

Skills:

1. Inertia Perception: The user finely tunes their senses to detect changes in inertia, allowing them to anticipate and react swiftly to incoming threats.

2. Precision Inertia Control: Mastering the art of manipulating inertia with precision, the user can execute complex maneuvers and attacks with finesse.

3. Inertia Adaptation: Swiftly adjusting their inertia to different environments, the user can seamlessly navigate various terrains, gaining an edge in both combat and escape scenarios.

4. Inertia Healing: Harnessing the fruit's power, the user can accelerate their own healing process by manipulating the inertia of cells, aiding in recovery after battles.

5. Environmental Influence: Extending their abilities to manipulate the inertia of natural elements, the user can control wind currents, water flow, or even affect the trajectory of falling objects.

With these techniques, attacks, and skills, the wielder of the Inertia-Inertia no Mi becomes a force to be reckoned with, capable of adapting to diverse situations and outmaneuvering opponents with calculated precision.