Guild Wars 2

So, should i open “Arah token loot box” or maybe “Risen Sentinel Loot Box” on my 80 level character or it doesn’t matter and i can just open on my low lvl characters on pvp?

Boxes which contain actual loot items (randomly generated armor and weapons) are generated based on the level of the opening character. For the Arah track, these are the 5/15/25/35 boxes, and all the boxes between.

Arah Weapon Chests, Arah Armor Box and Arah Token Box are not affected by character level, as they always produce specific items of your choice.

Quick unsolicited hint; it can be worthwhile to open your boxes on alts in the 50-65 range, because their salvage will be much more valuable than level 80 salvage.