Good build for Lohse...

[Sorceress]

She starts as enchanter - if Sebille is a ranger or fighter, Red Prince Wizard and Ifan as rogue, should she be a cleric...

[Damashi The Kaotic]

I always build lohse as a healer and buffer with a Lil summon magic. 1 point in areo, 1 in pyro, 1 in summoning, 1 in huntsman, 1 in geo, 3 in hydro. Buy or steal all the healing and buff spells, and give her incarnate, and totem spell. Both points in memory on level up. When she hits level 4 I put 1 point in strength, and 1 point in finese. She also my barterer so I give her all skilled up at level 4.

Build her however you like though. Divinity Original Sin 2 is all about giving you the freedom to build characters however you want, and it will work as long as you are smart with positioning and party synergy.

[Sorceress]

Thank you. I went with my origin Sebille fighter or knight, I think, honestly I forgot, red prince wizard, ifan the roguee and Lohse the cleric...

[Syrae]

I like to play her, so I pick het at start and make her a rogue/necro/witch. Red Prince is fighter/cleric, Ifan is wayfarer and Sebille goes summoner magic user

[Black_Lotus]

I build her as a magicical support tank. High wits, strength, and constitution while focusing on Hydro, and poly, and warfare. She becomes this giant wall with buffs, heals, and a crap ton OF CC.

[Sorceress]

I like that you can choose your companions class in this game. And without mods, of course...