Go for it. The Spear talent is honestly so negligible I never grab it, but I almost always grab the Sword & Axe ones if I can afford them, and I actually worry about not being able to snatch them sometimes.
This buffs Mutated Hold Upper and Mutated Spirit Hunter's general damage by a smidge, but it doesn't really matter considering both of those proc parry effects such as Eviter/Stalemate/Ice Point Guard, so nothing that'd really get out of hand. And in practice, their numbers don't turn out all that amazing anyway. Just "good."
This buffs Mutated Hold Upper and Mutated Spirit Hunter's general damage by a smidge, but it doesn't really matter considering both of those proc parry effects such as Eviter/Stalemate/Ice Point Guard, so nothing that'd really get out of hand. And in practice, their numbers don't turn out all that amazing anyway. Just "good."