Weapon idea.

Hello!

So my Dwarven ranger has taken his bow to a smithy to have it upgraded. I've constructed this reinforced bow, with an added ability "overkill" essentially taking the bow just past its limit to get an extra powerful shot. Here's the basic concept I've worked out:

Long bow, reinforced 2d6 piercing damage

Overkill 2x per day

• (-5) to D20 roll - success hits - fail, unable to attack

On success: -must succeed DC 12 strength check -on success add additional 2D6 -on fail, take 1 dmg point - on roll under 5, take 2 dmg points

1dmg point - (-2 to D20) - fix with a short rest (requires 2 leather strips) - DC 14 strength check

2dmg points - (-4 to D20) - fix with a long rest ( 4x leather strips) - 1 pnt exhaustion - DC 16

3dmg points - disadvantage on rolls - DC 18 - under 10, bow is unrepairable.

Am I overthinking this? Is there anything I've missed or anything that seems to be overcomplicating? Thanks!