Skillchain/Magicburst - This could easily add a bit of depth to playing. How it would work, is player 1 uses a spell or skill, and as a reaction player 2 must also use a skill or spell in a short window. If all goes well, following the second skill an option to SC/MB will proc on a separate hotbar icon much like Limit breaks (or automatically occur without confirming on a proc'd action press). Each job would have one spell or skill that works in conjunction with another job's spell or skill respectively. Here's an example:
-BLM uses Fire3 on the enemy
-PLD uses Rage of Halone 1.5 seconds afterwards
-both players after seeing the Skillchain action proc, hit the action within the 5.5 second window.
-Skillchain "Red Lotus Blade" occurs dealing damage with additional DoT burn effect.
== Ex2 ==
-PLD uses rampart
-WHM uses Aero
-Both proc
-Party gains "Wind Spikes" buff for 15 seconds
== Ex3==
-SCH1 uses physick
-SCH2 also uses physick
-Proc
-"Physickaga" cures entire party a small percentage of HP.
Adding status effects, both beneficial and detrimental, adds another layer to combat. Putting a limit of a 3 minute cool down of skillchaining per player can prevent abusing them, and make players more likely to use them during more important fights, like the boss and sub-boss, as opposed to trash mobs. If stacking certains jobs becomes too prevalent (such as the all OP BRD), removing skill chains with 2 identical jobs and making skill chains worth the different job positions can help with this issue (more of a reason to bring WAR/MNK/DRG to endgame content if their SC made their presence more valuable)."