I dont think i get into any specific "builds" in this game ...
But personaly i have much fun with combining certain items ...

I have tryed the Elite Sniper that is also described here on forum ... but i really hate crossbows, so even tho it was stronger i had to let it go and return to my bow archer. :3
In the future i would like to try to combine it somehow with that bow from Auntie ... and Ranger instead of Rogue ... or maybe multiclass, or some other way to get my hands on Hunters Mark to futher incerase my damage outcome? Dunno. laugh

The best one for me is pure Warlock with fire "build" that simply contains from items that allow you futher incerase power of Scorching Ray ... meaning gloves for cause burning from fire damage, ring that gives you +1 to every Fire Damage roll and gead piece (i only dont use that crown that gives you Bonus Action ... i rather use that one that allows you to cast Scorching Ray for free).
Tricky part here was to find good weapon ... since staff or arcane blessing is useless for warlock, since you want to keep concentration for Hex instead of Bless ... and most meele weapons is useless if you dump Str ... finaly i decided to use free-resistance staff from Ethel ... but now im thinking about Nere's Rapier just in case i would be forced to use meele attack ...
(Of course this build can be aproximately twice as powerfull if you use it for Sorcerer with Warlock Initiate laugh )

I have also tryed Poisoner Build ... that would be interesting for Poison - Dragonblood Sorcerer on level 6, when he starts to add Cha modifier to that damages ... im really curious if that will improve just Ray of Sickness damage, or also Poisoners trait.
Staff of crones (free Ray of Sickness) + Poisoner robe (+1d4) + Ring of poison resistance (halven the damage staff curse gives you) + Illmater Aid (+1d4 if you have 50% hp or less ... wich is quite easy to achieve since you keep damaging yourself laugh a little ) + Gloves of Power (im not sure if they still work for spells on Patch 6 ... since i believe i gived them on Astarion when i played this ... but i know in the past i was using them with my Warlock and they were causing Bane to anyone my direct spells hit)
So in the end ... lots of damage, free bane for two targets and potentialy poisoned that also cause them attack with disadvantage. :3
Especialy fun with Twinned spell, my Sorcerer was best debuffer i have ever played. laugh :3

But i believe the most OP i have tryed so far ... was Life Cleric ...
I mean if you combine it right (wich isnt really hard, since all items wich effect says "when you heal..." goes for the cleric anyway laugh it only takes some time, since they are spreaded across whole Act 1) ... you are able to create character that is with single spell (Channel Divinity, wich replenish during Short Rest) able to heal whole party and every friendly target around ... give everyone free disengage, free blessing for one round, 3 temporarily hit points, and free Blade Ward, while also heal youreself for aproximately thrice amount of your full HP ... that is certainly not a bad deal. laugh
Once again i was kinda struggling with weapon for this "build" ... but eventualy i decided to use Vision of the Absolute ... since it can cause Blinded, wich let my party members to attack with advantage. :3

Curently im struggling with trying to find some uses for Mourning Frost ... but i didnt find any. frown
That staff is simply shit. -_-

I also never understanded how to properly play Moon Druid. :-/
I mean most artefacts have zero effects on you, when you are shapeshifter anyway. laugh


I still dont understand why cant we change Race for our hirelings. frown
Lets us play Githyanki as racist as they trully are! frown