Original Post — Direct link

Wasn't sure since I should post this on the official forums or here, but I am pretty sure this is a bug.

When I run no regen map I can't rain of arrows anymore, when it should auto attack since I have no mana. Pretty annoying.

External link →
about 4 years ago - /u/Mark_GGG - Direct link

This is intentional. Rain of Arrows is fundamentally different from the default bow attack in ways that make them not equivalent, so the downgrade is disabled for that skill to prevent unwanted interactions, such as causing the player to move.