If the number of active Shadows are at maximum capacity, Nekros will perform a shortened animation.
A copy whose original had 200 total health and dealt 100 damage per attack will have 200 × (1 + 1.3) = 460 health when summoned and will inflict 100 × (1 + 1.95) = 295 damage per attack. For example, +30% Ability Strength will increase the damage and health bonuses to 1.5 × 1.3 = 195% and 1 × 1.3 = 130% respectively at max rank.