Speaking about "What other item can give you anti-crit lifesaver for 3-5k": there is Talisman of life's breath, lesser (3,500gp, Occult Adventures).
Yeah, it's just 5d8+5 heal, which is less than a good crit. But it's a lot more versatile, saving your arse much more often. And while it occupy precious neck slot, you can also have freedom of movements (900gp) and feather fall (50gp) talismans, for example.