Dragon armour, barded elven steed and shield with the dawnstone- 2+ armour with a re-roll. If I am taking a dragon (at least if I did- no dragon for 8th yet) I would always take the armour of caledor and vembraces of defence. 80pts but a rerollable 2+ save and a 4+ ward plus fire immunity for rider and dragon are great... just leaves enough points free for talisman of loec or amulet of light. Both of which are great fun (love playing ethereal enemies when they suddenly realise that even my dragon is pumping out magical attacks

)
Pretty much any hero from any army that can take common magical items can get a rerollable 2+ save by taking heavy armour, shield and a barded steed. If you add a few extra points in you can make it a rerollable 1+ by taking something like an enchanted shield or the dragonhelm (still only done using basic equipment and common magic items).
Empire and chaos could easily get a rerollable 0+ save except that the new rules state that 1+ is as good as you can get (laughing at tyrion for that one, poor chap- only a 1+AS and either 4++ or 4+ regen).