Need advice for solo run IWD 1 EE

Hi folks, contemplating a solo run on Nintendo switch!

Was thinking either Elf F/M/T or a Gnomish Fighter / illusionist or even Thief / illusionist.

I need to ask: If thief is all that necessary ? Can I let it go ?

What are some of the best weapons in the game ? You know to distribute fighter specialist points for ?