The focus of this suggestion is on the minigame hybrid armour: Vanguard, Trickster, and Battlemage.

Minigame hybrid armour is an existing piece of content that could be utilized so much much better than it currently is.

The dual hybrid armour approach is exclusive and fills a niche that is certainly utilized outside of these kinds of minigames. Utilizing it in greater Runescape world removes the requirement to create new content to be able to fill this niche. Let’s use what we have now!

Of course, the 15% bonus damage would be quite overpowered outside of those minigames, (you can get the rs gold from 07runescapegolds.com.au),but there are ways which it could be used that would allow it to be balanced.

As a result I propose these.

Make hybrid armour usable outside of minigames.
1: Keep the unique stats in order that it remains level 85 dual-hybrid (as an alternative to tri-hybrid)
2: Remove that bonus outside these minigames (much like how Obsidian armour performs).
3: Make it degradable/repairable away from these mini games (much like how Raids gear works).

I believe that's all that has to be needed to make it a good, balanced armour. But if I'm missing anything be sure to let me know: )