There are item combos you can easily use on any character.
1. Amulet of Misty Step + Watersparkers boots + Rain Dancer + The Sparkswall. Teleport into the fray -> Cast CW -> 4d4 electric aoe + 3 charges next turn.
2. Boots of Speed + Fleetfingers. BA Dash -> Free jump.
3. Chain of Liberation + Haste Helm. 3 turns of momentum from the helm equals 2 sprints total from the chainmail -> great mobility for shorties, great kiting for ranged.
4. Speedy Lightfeet + Fleetfingers + Hamahraft. Dash -> Free Jump for 1d4+1 AOE -> BA Jump for 1d4+1 -> 2 charges for the next turn.
You just described some game that no one would recognize as D&D.
These "item builds" are also the kind of gameplay I would never want in any serious story driven RPG I play. It belongs in repetitive loot grind ARPG's like Diablo where I would find it fun collecting a lightning set. For BG3, these items are getting
so gamey they detract from the storytelling of the game. I can imagine the characters talking about some legendary sword but I really can't imagine them talking about how Astarion is still missing the gloves for his sweet Momentum kiting set. One moment you're having a serious conversation and 2 minutes later throwing water bottles with an unrealistic amount of liquid in them so your clever Lightning combo build goes off on your PC who literally started adventuring 2 days ago.
It's just too gimmicky and I hate it in this game.
Also the kind of gameplay that doesn't belong in a serious story driven D&D RPG.