Parry/block using spiked shields/

[shrewd harbor]

in the inventory, right clicking on a shield should for you to focus on really blocking behind your shield, interupting your next attack and greatly boosting defence.

this would use special attack bar.

this could be a great boss mechanic where you have to tank big telegraphed hits that would oneshot you.
this could also be using the dragonfire shield to tank fire abilities.

I think this could positively impact combat since wearing a shield could stop a well timed weapon stop, but wouldn't be to overpowered in pvp since it uses your own special attack or run energy.
this could also include new shield types that parry or stun the target when deflecting a hit.

not to overcomplicated mechanics as it would just require you to right click on your shield in the equipment menu.
(this could also just be a block button in the combat bar)

extra bonus: right clickign prayer books could give you back some prayer points you so desperately need in exchange for special attack bar.

[stray gust]

This idea is great, if they can somehow make it work with the current combat system. You'd have to be able to do it a tick before an attack, and possibly roll for success in hit or something.

[shrewd harbor]

it could work like swapping out weapons and comboing

[weary socket]

I could see this working similarly to Sol Heredit parry system, but it would need to be with new bosses and new items, and even in that case I dont really see the need for a new item solely for this interaction