Blast Rain

Blast Rain needs a massive buff.

Blast rain is in the worst state of any arrow gem, the 'buffs' to blast rain effectively made it useless.

by adding more arrows and reducing damage you minimized the effectiveness of GMP
by converting 100% of physical damage you've removed all poison scaling.

Ontop of all of that is the slow to hit rain delay that cannot be mitigated , its small aoe radius is a joke, projectile speed is also only nominally useful and compared to tornado shot which effectively allows you to kill offscreen enemies blast rain's projectile speed does not reduce fall delay but only increases the speed at which the arrows will fall once the fall delay ends.

Essentially you have made blast-rain unscalable and useless for applying debuffs, so what role is is actually fulfilling?

Blast rain is a sleeper, not at all weak