It makes sense for a Hexblade/Stone Sorc mix for sure. 1 level gets you Cha to attacks, Eldritch Blast, and a single short rest spell slot for stuff like Shield. A 2nd level gets you another short rest spell slot, and invocations (agonizing blast is a must-have) though you lose an ASI and more spell progression as a result.
I don't think it makes as much sense for Hexblade + Stone Sorc + Paladin, because you still need Str 13 which is a bit of a waste. Your spell progression is also watered down yet another level. Paladin smites are nice, but you also have smite options through Stone Sorc which are semi-decent.