Board Thread:Game Discussions/@comment-24108837-20140409104009/@comment-217.19.30.150-20140412211337

They probably hope that the people who are just short of reaching 43 use 11 gems once or twice at the summoning stone... (arena should be able to provide those gems for them)

It used to be common to need 5/2, 2/5, 4/3 or 3/4 formations on reward levels like 43 and 51, but then stat inflation and so many guilds reaching high element bonusses made that a "no problem with 5 knights". Gree is now correcting that.

If a level 80 player needs less than 4 friends for boss level 43, it's probably too easy.

Problably the major thing that's hindering people is the reduced epic energy drop rate.