Fun melee builds are fun. Make the most awesome tavern brawler - but a Tempest 2/Evocation 2 /Storm Sorc 8 will make Orin wet and then show her true murder. Damage numbers in the five hundreds will fly across an entire screen whilst one screams 'unlimited power'. Do you know what happens to a Beholder that's struck by lightning? Same thing that happens to everything else.
But, if you're just playing normally, and don;t go for the super optimized multiclass builds, then yes. A Battlemaster Fighter is the MVP throughout your game. And mobility is king, so Lae'Zel really shines with her psionics. I did a 'going ot make the ultimate blaster' run and got tired of it being too good. I ahve way more fun with a suboptimal wizard with lots of spell to try out, like locking a door for ten turns and so forth.
My next run will be a 'no-multiclassing no-respec allowed' run, and will play as one of the origin characters. I suspect Laezel is, then, the absolute best - but at the same time, Karlach will not come second.
