This is a slight tweak to the excellent Ordinator - Perks of Skyrim by EnaiSiaion. Ordinator's two-handed tree contains a level 90 perk named Voice of Rage and Ruin which gives each swing with a two-handed weapon a 4% chance to activate the currently equipped power. This mod tweaks that perk so that it will instead have a 4% chance to activate a power of your choosing. You'll then be free to leave whichever powers or shouts you wish equipped during combat, which can be handy for a shout or power heavy build. The power which will be activated by Voice of Rage and Ruin can be freely changed at any time when you're not in combat.

The change is implemented in a similar manner to the Spellscribe perk from Ordinator. Upon taking the Voice of Rage and Ruin perk you'll be granted a spell of the same name. Use it to store your currently equipped power. Each of your two-handed swings will then have a 4% chance to activate the stored power. Cast the spell in combat or without a power equipped to disable Voice of Rage and Ruin.

Voice of Rage and Ruin is otherwise unchanged. It can still only activate powers (not shouts) and you need to be able to use the power at the moment Voice of Rage and Ruin triggers. If you lose access to the power which you stored then Voice of Rage and Ruin will be effectively disabled until you select a new power.

Important Note

I made this because I wanted it for a playthrough and couldn't find anything similar. I'm very inexperienced at Skyrim modding so the implementation might be quite rough, but I'm uploading it in case it's useful for someone else. It's worked fine for me for a 20+ hours of gameplay so hopefully it holds up for you too.

Installation

Ensure that it's after Ordinator in your load order.

It's safe to add to an existing save if your character doesn't have either the Massacre or Voice of Rage and Ruin perks in the two-handed tree. If you've taken either of these perks already then you can remove them first (see "How do I refund my perk points" in Ordinator's FAQ, or use the console), install this mod, then re-add the perks.

Compatibility

This should be compatible with anything that doesn't change the two-handed perk Massacre or the two-handed perk Voice of Rage and Ruin. It should also be compatible with mods which change the perk tree but do not modify the perks themselves, such as Ordii and Vokriinator. I've tested it with Vokriinator Black.

Removing the mod

It's probably safe to remove this mod from an existing save if your character doesn't have either the Massacre or Voice of Rage and Ruin perks in the two-handed tree. If you've taken either of these perks already then you can remove them first (see "How do I refund my perk points" in Ordinator's FAQ, or use the console), remove this mod, then re-add the perks.