Amrûnril
Hero
While the ability to use CHA for weapon attacks certainly makes more sense as part of the blade pact than as a patron ability, I think it's worth noting that continuing to attack with physical ability scores also seems like a viable strategy. A blade-lock attacking with DEX and using most of their spell slots on Hex and Eldritch smite is free to treat CHA as a secondary or tertiary score, the same way most Paladins and Rangers do with their casting stats.
As in most cases of unorthodox weapon-using builds, DEX works much better than STR, since the former contributes to AC automatically, while the latter requires a hard to obtain armor proficiency. If heavy armor training were made more readily available through an invocation or background feat, I think it would do a lot to facilitate diversity in Warlock builds.
As in most cases of unorthodox weapon-using builds, DEX works much better than STR, since the former contributes to AC automatically, while the latter requires a hard to obtain armor proficiency. If heavy armor training were made more readily available through an invocation or background feat, I think it would do a lot to facilitate diversity in Warlock builds.