Gambleshot fix

Adjust how Gambleshot Support works.

Let it roll 2 between: Pierce, Fork, Chain, Lucky Crit, Lucky Damage, Unlucky Crit, Unlucky Damage.

or

Let it roll the current values per hit or per projectile, not per attack.

At the moment its practically just a worse support in every category, there really is no upside to inconsistently doing any of 3 supports we already have. If you want to pierce, you can fork or chain for a better effect usually. If you want the other 2, pierce isn't good cus for example it wont proc infusion effects of fireball.

If it was changed to either of these 2 things it could be a really fun support and would just become useable instead of overpowered.