Stimpack

Strategy and Synergy
Below Hell Pass 11, this artifact is a strictly worse version of Rescue Badge, as that artifact doesn't cost any HP and will give more Spell Power once stacked.

On Hell Pass 11 and Beyond, This artifact is more slot efficient source of power than Double Edge aside from the max HP cost if the defense loss is important (20 Stimpacks gives 60 Spell power, 15 Double edges gives 60 Spell Power, 6 Giants Armors to make up the Defense Deficit, and then 6 Lily's to make up the Mana Regen deficit, for a total of 27 artifact slots). Double Edge's defense loss is inconsequential if only Shield is taking damage however (without hardened shields). Which one is better depends on how much shield is being generated.