Armor:

Helmet: A dedicated Energy Shield helmet is great for scaling your Energy Shield pool. It also increases the Evasion bonus granted by your passive tree. Focus on flat HP and resistances.
Body Armor: Look for Energy Shield + Evasion bases. Vaal Regalia or Path of exile currency similar light armor options are ideal for this build.
Boots: High Movement Speed and Evasion are important for maintaining mobility and defense. Energy Shield on boots is a nice bonus.

Rings and Amulet:

Focus on increased Lightning Damage, Evasion, and resistance. Energy Shield mods are beneficial, but flat HP will serve you well until you reach later game stages.

Build Tips

Tempest Bell for Bosses: Don't forget to use Tempest Bell during boss fights, especially for single-target damage. It will provide an immense DPS boost when you throw Glacial Cascade or Storm Wave near it.

Glacial Cascade and Storm Wave for AoE: These are your AoE tools for clearing mobs, especially during tougher Act encounters. Storm Wave will become your go-to skill as you progress.

Power Charges: Make sure to generate Power Charges whenever possible. Siphoning Strike is great for this purpose, as it will keep your Falling Thunder boosted.

Scaling Evasion and Energy Shield: Focus on Evasion and Energy Shield hybrid gear until you can stabilize your defenses. Evasion will help you dodge attacks in the early game, while Energy Shield becomes more important as you face tougher enemies.

Conclusion
The Monk build in Path of Exile 2 offers fantastic clear speed and single-target DPS thanks to Tempest Bell, Falling Thunder, and Charged Staff. With the right focus on Evasion, Energy Shield, and Power Charges, you can scale this build effectively throughout the campaign and into the endgame. Invoker Ascendancy gives you the utility and POE currency for sale damage scaling needed for tough bosses, and the passive tree prioritizes survivability while scaling lightning damage.

For optimal results, focus on gathering the right gear, upgrading your skills, and using your currency wisely for key items. If you need further advice on optimizing your build, acquiring currency, or anything else in PoE 2,