What puzzles me about the phase spiders is that there ARE spiders who are canonically supposed to have ranged attacks in D&D, so it's not really clear why Larian felt the urge to use one that it's notorious for being a "melee only" beast and gift to it an arbitrary ranged aoe venom spit.
This complete disregard for implementing the "appropriate canonical movesets" for their bestiary is part of what often makes me feel that Larian goes through the handling the D&D license as a painful constriction rather than a pleasure or privilege.
And, it isn't like they don't have enemies doing things like Ethereal Jaunt with Invisibility Potions and jazz, so implementing it correctly wouldn't be hard. I don't get it. If you think the battle is too easy, throw a few more spiders in the battle, don't mess with a monster's stats. I mean, messing with the stats makes a monster no longer the monster. Like you said, the phase spider then becomes like a whole different type of spider.
