This build, all of my builds are for BG3, so 10 levels max for now.
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Yeah, BG3´s level cap of 10 is more restrictive. You may want to go 6/4 or 8/2 to get all your ASIs and the extra attack if applicable. I doubt you will have the feature to run through walls and water of the monks in BG3, so It´s safe to abandon the 9th level monk unless you want to go full monk for the Purity of body feature of level 10. You really want the level 7
evasion and still mind over the (OMG What did you do to the rangers, Wotc) ranger´s 4th level class features so I suppose 8monk/2 ranger would be the best bet, IMHO, if you want to maximise your character, as you asked, but other options you pointed out seemed fun as well.
ED: Read and cry.
Primeval Awareness
Beginning at 3rd level, you can use your action and expend one ranger spell slot to focus your awareness on the region around you. For 1 minute per level of the spell slot you expend, you can sense whether the following types of creatures are present within 1 mile of you (or within up to 6 miles if you are in your favoured terrain): aberrations, celestials, dragons, elementals, fey, fiends, and undead. This feature doesn't reveal the creatures' location or number.
(It´s so situational and restricted that It makes you cry, and you have to spend a spell slot in this)
