20 ranger (28 pt):
18 Str
10 Dex
16 Con
8 Int
8 Wis (+6 item for spells)
8 Cha
Base: 20
20 Ranger: +160
Draconic Vitality: +10
16 Con: +60
+10 Con Item (+7 Enh/+1 Ex/+2 Ex): +100
+4 Tome: +40
Toughness (Feat): +22
2 Racial Toughness Enhancements: +20
Superior False Life: +40
Toughness (Gear): +20
GS HP Item: +45
=537 Permanent
Single Madstone: +40
Rage Spell/Potion: +20
Airship Buff: +20
=617 Sustainable
He did say 'max out', which I took to mean +4 tome and epic gear.