What do you mean with formidable?
Is it that you're wondering if this character can be played on master difficulty, because it can, or do you mean if it would survive rushing through dungeons, walking over traps and roflstomping everything on its path without much care in the world?
If the latter is the case than you'd surely die a horrible and painful death. You can play a build like this more safely with the soul cairn summons, not having the need for corpses to depend on make a huge difference but in my opinion take away much of the excitement.
tldr; If you're looking for something that can be played fast-paced with some spell juggling, you should try it out.
What do you mean with formidable?
Is it that you're wondering if this character can be played on master difficulty, because it can, or do you mean if it would survive rushing through dungeons, walking over traps and roflstomping everything on its path without much care in the world?
If the latter is the case than you'd surely die a horrible and painful death. You can play a build like this more safely with the soul cairn summons, not having the need for corpses to depend on make a huge difference but in my opinion take away much of the excitement.
tldr; If you're looking for something that can be played fast-paced with some spell juggling, you should try it out.