A positive whole number (level 1 or higher).
How this is calculated
  • Minimum shareable level = ⌈2 ÷ 3 × your level⌉ (rounded up).
  • Maximum shareable level = ⌊3 ÷ 2 × your level⌋ (rounded down).
  • Two characters share XP only when each is at least 2/3 of the other's level — so the band is symmetric around your level.