Mana matters while channelling

[stkmro]

I am playing with ForgeGuard with Warpath skill.

I like to use Forge Strike to hit the mobs a couple of times and then use Warpath after that. But while channelling Warpath, the mana stops regeneration.

Is there any idols, or uniques, or shards affixes that can allow mana regen while channelling?

Or is there any idols, or uniques, or shards affixes that can allow mana gain per hit or mana leech while channelling?

[PvtVlad]

Not at the moment

[CaiusMartius]

Consider the Dark Nexus node in the Warpath tree. At 5 points you can gain 35 mana every 3 seconds.