I'm thinking twice about my druid. The only cantrips benefiting from Spell Sniper are Produce Flame and Thorn Whip. If we're facing a bunch of fiends, they may be resistant or immune to flame. Thorn Whip is magic piercing, but a feat to boost a single cantrip is a bit expensive, even if I'm playing a "Cast one Concentration Spell per battle" spellcaster, and not very many druid spells benefit from a boost to spell attack rolls.

Since they come every year, we should generally know what we're going to face. Hordes of zombies? Hordes of skeletons? A smaller number of more powerful undead? Substantial numbers of actual fiends (ice devils, vrocks, etc.) that are likely to resist some elemental damage and have advantage on saves vs. magic?