Bless is huge, the most powerful utility in the game.
Giving your party a 15%+ extra hit chance and leas chance of being hit/CC/debuffed is humongous.
Casters suck ass in EA anyways, especially warlock since summons are a static 65% hit chance regardless of bless or backstab, and warlock is an Eldritch Blast bot with poor damage potential and only 2 spell slots, one of which is always taken for Hex to do any meaningful damage.
Since Hex is a concentration spell, and concentration is a garbage mechanic that disallows your casters from layering utility or CC combos, warlocks are pretty much gimped.
Your Hex+EB still does less damage thana single Lazael greatsword autoattack swing without poison or fire coating.
So, forgwt Wyll and grab Shadowheart+Lazael for best results, and you only take Gale whwn you have the magic missiles necklace to make him relevant, otherwise it's an all martial party with Astarion since casters are super weak.
Particularly because racials are so imbalanced with humans and tieflings being really weak, and human casters have no darl vision in the Underdark, making their hit rates awful ubtil you buy the magic ring from the vendor in the Myconid colony that removes obscured statua from enemies, or if you use Darkvision on your druid to give your human casters Darkvision.
