Concept Idea:
Certain abilities get a better/stronger effect if they are activated shortly after the another unit nearby activates a specific ability.
Based off:
Battle of the five armies, the dwarves being used as trampolines by the elves:
(http://i.imgur.com/HkcSQ89.jpg)
This came to me randomly when I was watching Battle of the Five Armies and I saw the elves jump over the dwarves to get an advantage. The idea is to promote/enhance teams in the PvPs, I doubt it will be used much in skirmish as the AI has quite a.... limited strategy. This will really enhance the team concepts and maybe allow certain races that were previously not team-compatible to become so. This is implementable although I believe it will take some (lots) work. It can be based of the Witch-King's Aura ability, which is the only ability that has that concept I believe.
Some Example:
If Aragorn (Gondor) uses blade master while Legolas (Elves) use his knives or vice-versa both abilities get an enhanced +25% damaged boost. Ability must be activated close to each other and within 10 seconds.
If Merry (Rohan) uses Dagger of the Noldor while Pippin's (Gondor) Dagger of the Noldor is active or vice-versa then their speed is increased by 25% more.Ability must be activated close to each other and within 10 seconds.
If Haldir (Elves) uses his Hope ability (need elves implemented to remember name :( ) on Aragorn (Gondor) uses his Blade master Ability the effect of Haldir's ability are boosted by X%. Ability must be activated close to each other and within 10 seconds.
Uhmm.. that makes two Gondor & Elves doesn't it. Well, nevermind you get the idea. I'll put a poll up top for people that don't feel like writing but still want to give their opinion. If you do want to write, I'm all hears (eyes?).