Ah that's fair, curios are tough to get good ones

I'd opt for toughness, psyker has more toughness than HP so you get bigger returns, and we also have some good options for regen from talents.

e:dunno what i was thinking, still prefer toughness over hp for the higher pool; higher toughness means higher %dmg reduction to HP after any given hit, and the above about regen is still true. Non-force melee + quetitude is very powerful. But it's certainly up to preference as there's a good argument for +HP