Sounds pretty good now, but I like the idea of his blood giving him resistance as long as it isn't invulnerability to the arcane

Making him a good duellist but weak in group combat makes him rely more on friends, which is always a good weakness to have as it isn't majorly bad but still allows you to have dramatic fights with main villains and win.

Not aimed at you, but flaws are what makes a character. We can all write how talented our peeps are but nobody is perfect, and it feels better to have to work on each others strengths and weaknesses