You must change
// Units types affected by max_lv and aura_lv settings. (Note 3)
// Note: If an unit type, which normally does not show an aura, is
// set it will obtain an aura when it meets the level requirement.
// Default: 0 (none)
client_limit_unit_lv: 0
to
// Units types affected by max_lv and aura_lv settings. (Note 3)
// Note: If an unit type, which normally does not show an aura, is
// set it will obtain an aura when it meets the level requirement.
// Default: 0 (none)
client_limit_unit_lv: 1