Multiplayer Interactivity - Class interaction

I was thinking about how skills blend and thought it would be cool to add it to multiplayer.

Take the fight on the Dreadnaught, for example. Asala creates a barrier that provides a bowshock protection during the sandstorm phase, like hiding behind the dagger during the titan fight.

I think it would be sweet to be able to do that in multiplayer - if a player raised a shield then another player could fortify/reinforce/empower that shield to allow the first player to maintain it for longer.

Party support skills could be interesting for raid-type dynamics further down the line.