In my opinion there are two types for MMORPGs when it comes to trash mobs:
a) Either you gather tons of mobs which will follow you and you will kill them with aoe-bombardment (RO and Diablo are this way)
b) You focus on only one or two mobs at a time, where the battles are more complex but also alot slower and itās alot harder to gather more than 3~4 mobs together, let alone kill them very fast. One example would be Aion.
Tree of Savior, in my opinion, fits in category āa)ā and i donāt mind it.
About trash mobs:
Since this is a spiritual Ragnarok Online sequel i donāt mind normal mobs to be rather āstupidā, since normal monsters in RO were also quite stupid and it made it more fun to gather tons of monsters and kill them at the same time. Imagine if monsters were actually smart, this kind of gameplay wouldnāt be possible if monsters were smart enough to not run after you.
About boss monsters:
While there are certain differences between boss monsters i think they are way too similar. Pretty much every boss iāve encountered so far opens up with throwing trans and then does his thing. And while ātheir thingā can have a bit of variety (some monsters charge around, some stand in place throwing projectiles, some try to melee you) they still feel kinda similar, and i think there could be done alot more with the traps. Donāt throw 4~5 traps that almost donāt do anything at the same spot, scatter them all around and make them do stuff that requires strategy or quick reactions (for example scatter 20~30 traps with lights around the arena. After a while some randomly chosen traps become red and will explode in the next 5~10 seconds while other traps become green, meaning they wonāt explode, so the player has to flee to the green traps. After the red traps exploded the traps turn off again, exploded traps respawn and new randomly chosen traps will turn red).
And yea, alot more could be done with the dodging mechanic.
The mole boss (shooting needles from his back) or the big-eyed beholder thing (that shoots laser beams from its eye and throws energy bolts all around him) a re bosses that i enjoyed.
I havenāt seen all bosses yet (only lvl 200 so far), however I think bosses could also use more of players abilities, like Psychokinos throw-targets-around ability, Chronomancers timestop (boss casts timestop on healers -> other players have to survive on their own for ~10 seconds), Corsairs Keelhauling, Joint Penalty+Hangmans knot-combo, etc.