Question about arenas and stigmas

Newbie here. I'm a little confused with the new stigma system. Are stigma stones themselves now useless and is it not necessary to even fill the six stigma slots? Basically we all have access to +10 stigma skills regardless of them being slotted?

Also, at lvl 65 I'm getting the daily arena tickets but aside from the crucible challenge solo/group, I've not been able to get into the other arenas despite I think arriving at the scheduled times. Can someone explain to me what Marchutan Prioty is for?

 

The current system indicates that the stigma system will be cycled season to season. A season is typically 3 months in duration, the current season is Full Stigma began on January 4th and will presumably end on April 4th. The following season, April 4th to July 4th, will have a regular stigma system in which you need to have the stigma stones and socket them into your stigma slots.

Regarding arenas, double check the schedule on the website for the time table for arena hours. The tickets allow you to do Arena of Discipline (1v1) and Arena of Cooperation (3v3) and on the weekends Arena of Glory with tickets won from discipline/cooperation. Maruchtan Prioriy is also the place to buy powerful abyss gear using ceramium medals/AP and contains special NPC that are available to players who reach General rank or higher to purchase additional items and abyss gear.

 

Wow, thank you for the clarity!