* for early game, use Circlet of Nobility to be pair with Gauntlets of Strength / Slippers of Agility / Mantle of Intelligence, to form Bracer / Wraith Band / Null Talisman, your choice...
Ring of Basilius (Ring of Protection & Sobi Mask) and
Headdress of Rejuvenation (Ring of Regeneration & Ironwood Branch) are good helps too...
* midgame, use
Vanguard (Ring of Health, Vitality Booster & Stout Shield),
Soul Booster (Vitality Booster, Energy Booster & Point Booster)...
* then if you have plenty of gold, buy these:
Bloodstone or much better, Aghanim's Scepter (Point Booster, Ogre Axe & Staff of Wizardry)
Heart of Tarrasque (Messerschmidt's Reaver & Vitality Booster)
Mjollnir (Maelstrom & Eaglehorn) or The Butterfly (Eaglehorn, Talisman of Evasion & Quarterstaff)...
* then pick an item with heavy damage, that should do it...