Support Gem idea

Name: Target Locked
Color: Green (+5 dex)
Tags: Attack, Projectile, Mark, Lineage (Maybe?)
Tier: 4 or 5
Requires: Bow, Crossbow, or Spear
Description: Supports Attack Projectile skills that rain from above, causing them to land on a Marked enemy instead of the ground.
Supported skills will rain down on a Marked enemy

So my idea here is to allow some skills to actually hit bosses that move a lot. Primarily skills that have a cooldown, conditional, slow attack speed, or like a payoff skill.
Skills with a duration like Tornado Shot & Spear of Solaris would essentially cause marked target to become the tornado & the lodged spear respectively, Rain of Arrows will have arrows fall as if marked target is the center of the AoE. Only until the Mark either activates or duration ends.
Skills that shoot multiple projectiles and/ or stick to the ground like Toxic Growth, Lightning Rod, & Stormblast Bolts would have like 1 projectile attach to a marked target per skill use I guess? Then other projectiles will land around it.

TLDR: I want my Spear of Solaris to actually hit the boss after being forced to tumble backwards for like 10 seconds