How to use more than 2 ranged attacks?

Grim Dawn Gameplay Discussion
1

I’m playing my second ranged character, and I thought I had this figured out previously, but apparently not: how do you simultaneously fire 3 or more ranged attacks? Is it even possible? For example, I have Fire Strike bound to Mouse 1. When I tried to bind PRM to Mouse 2 they wouldn’t fire simultaneously, so I bound PRM to a key and then I could fire both at the same time. But adding in Fireblast from an item, I cannot get all 3 to fire at the same time, regardless of what mappings, what order I initiate the attacks, etc. Is this intended, or am I missing something?

Related question: on another toon I have a channeled ranged skill from a relic, Conflagration. It seems you cannot fire any other ranged attack when using a channeled attack of this kind. Also intended?

2

This is an exploit; it may be fixed at some point.

You are not supposed to be able to use more than one skill at a time, save for skills that are ‘instantCast’ like particular buffs.

3

Does that also apply to skills bound as default attacks, such as Fire Strike? I would think you can fire both default and one other, such as Fireblast from an item.