I have idea.. Bright one.. IGG should put chats into mesa/lava/wg/bosses and every other team modes like Fortress Feud, PLEASE!
I don't think making "chats" is IGG's responsibility, it is the community who should step up for the benefit everyone in the server. Besides there are chats for pretty much everything already (in LINE). Lava, WG, infernal summit, social chats, recruitment chats, leader chats, and more.