Often enough the monsters and the other player just stand there doing no animations. Positions and animations for mobs and the host player are completely off. The game is heavily out of sync for the joining player.The host does not even see the skill animation for the other player The skill animations for summing skills play but the skill does nothing. Sometimes summons on the joining player do not appear at all.The wizards electrocute also does double damage (two damage numbers per hit) and consumes double the mana. Also some skills are casted multiple times - like summon wolves from the nature tree causing the first wolve to instantly die (death animation plays) and appear again. You can easily test this on the training dummies. He does double damage (quad damage for ranged weapons) - even a normal hit with a white weapon on a lvl 1 character pops up two/four damage numbers. The joining player (the one who is not the host) seems to trigger every action he does twice.My wife and I gave this mod a try in multiplayer and experienced several severe issues, essentially making the game unplayable. All new skills from expansion “Titan Quest: Atlantis” (released on 9 May, 2019) are absent in “Grimarillion”.“Runes” mastery is absent in “Grimarillion”.“Trance of Empathy”, “Trance of Convalescence”, “Trance of Wrath” skills in “Dream” mastery were present.In “Battle Standard” skill in “Warfare” mastery had 12.0 meter radius.In “Grimarillion” masteries of “Titan Quest” these skills do not allow it. Some skills in original “Titan Quest” game allowed certain builds. I have no problems with any changes in “Giramarillion” because I edit this mod regularly according to my needs. You can do whatever you want as the author of these masteries. Please, do not think of my words as a criticism. I think that changing play style of these masteries in “Grim Dawn” without a very good reason is not a good idea.

In original “Titan Quest” game masteries were played in styles that players are used to already. There are some strange decisions in “Titan Quest” masteries of recent builds of “Grimarillion”. You can edit “Grimarillion” mod as see you for such good implementation of masteries from “Titan Quest”.

Titan quest masteries mod classes