I haven't played PSO2, but I did play PSO and one of the more underutilized mechanics was the chaining of photon blasts. Every player had something called a MAG, which was more or less a customizable and equipable creature companion that allowed you to initiate these special abilities when your photon blast meter was fully charged, filled by taking damage or whatever. There were various photon blasts such as Pilla, which was just a big rain of AOE damage around your character, to Mylla/Youlla which was an attack/defense buff.I'm really apathetic to Limit Break as it exists now and if they can turn it into a set of cooperative mechanics as described (apparently from PSO2?), I'm all for it. Ideally, it would be more frequent. You know personally limit breaks building up slowly and being able to link to each other is pretty much like... adding FFXI's weapon skill system on top of this one. Would be amusing.
Enough fan-fiction from me though.
Initiating a photon blast took about three to four seconds. In the window of that three to four seconds for the first player who initiated it, other players could also unleash their photon blasts to chain them for a maximum of four since the party limit was four people. The incentive to chain was that the more you chained, the higher the multiplier for effects. For example, if you chained Pilla with Mylla/Youlla, both players would get the attack/defense buff instead of just the player who used Mylla/Youlla and it would be a far more potent buff than normal, including an extension to buff duration! AOE damage for Pilla would also be amplified because of the chaining, and it's by a significant amount.
However, there was one caveat... if a player used the same photon blast directly after another person, only the prior person's blast would have an effect. Two example scenarios below:
Player 1 uses Estlla (line AOE), Player 2 uses Mylla/Youlla (ATK/DEF buff), Player 3 uses Golla (single target damage), Player 4 uses Mylla/Youlla... result is that everyone's photon blasts contribute toward a crapload of damage in a linear path with an enormous attack/defense buff to the entire party.
Player 1 uses Estlla, Player 2 uses Estlla, Player 3 uses Golla, Player 4 uses Mylla/Youlla... result is that Player 2's Estlla is not counted towards increasing potency, but all other effects still apply albeit not as strong as the previous scenario.
Photon blast chaining was especially beneficial at the beginning of a boss fight. You could dish out insane damage if you had a party with fully developed MAGs and saved up your photon blasts so that you could chain them and give everyone an absurdly powerful attack/defense buff. I for one, would love something similar in this game.