I'm in a guild that gets about 4-5 tasks done per day which is not as much as the top ones by any stretch. I run Tyri as an integral part of my team as a mana gatherer/deny. The treasure maps are a welcome change of pace to me, seeing that everything else in this game is a full 4 on 4 match. PvP, challenges, unlocking classes, the Arena, you get my point. The rewards from the maps are also a huge thing for me. I average 4 keys, 25 glory, 1200 gold, 5 trait stones and 40 souls per map. Nothing gives that much variety of resources ib the game. And it is risk-free unlike PvP or the Arena.
Old gods banner
Psion(Winter Imp, Behemoth, any blue damage dealer)
Tyri charges in 2 matches of purple or green and fills up either Jarl or Valkyrie depending on the board setup. Jarl charges Valkyrie and himself and does great damage, Valkyrie charges Psion and gets souls, Psion does true damage to all and steals mana from all.
I run this as my all-around team. PvP, challenges, you name it. And it works.