Key Plant Skill Passives

Increased Damage with Path of Exile 2 Currency Plant Skills

Overgrown Plant Skills break 50% increased Armour

Gain 10% of Damage as Extra Physical Damage

+1 Fissure Limit (optional but extremely powerful)

Later, consider:

Desensitisation - Critical damage bonus and crit resistance

Erraticism - Faster casting at the cost of crit chance

Calibration - Increased Energy Shield and maximum Mana

Ascendancy - Disciple of Varashta

The Disciple of Varashta Ascendancy is an exceptional match for Plant Magic.

Why Disciple of Varashta Excels

Instruments of Power - Enables using a Focus alongside a Staff for massive stat gains

Baryanic Leylines - Expands Time-Lost Jewel radius for powerful passive bonuses

Kelari (Djinn Companion) - Applies Critical Weakness for higher crit chance

Ascendancy Order

1. Instruments of Power

2. Kelari + Kelari's Malediction

3. Baryanic Leylines (endgame)

If Kelari feels awkward due to cheap POE 2 Currency cast speed, The Fourth Teaching or Varashta's Intuition are solid alternatives.