Constitution should be your secondary focus. Although Warlocks aren’t nearly as feeble as the scrawny Wizard 5e, their limitedDnD armorproficiencies and low hit dice make them vulnerable. Your Pact Magic will be no use if you spend most battles crumpled on the floor, so nip it in the bud ...
Noble Genie Unearthed Arcana 67 - Subclasses, Part 1 Raven Queen Unearthed Arcana 29 - Warlock and Wizard Seeker Unearthed Arcana 16 - The Faithful Undead Unearthed Arcana 74 - Subclasses, Part 4 Undying Light Unearthed Arcana 10 - Light, Dark, Underdark! Pact Magic Your arcane research and th...