What weapon/Aspect should I take Barley Sheaf with?

[Sintonir]

I kinda understand what other gods are best for. But Demeter doesn't seem like she is great with any specific weapon or Aspect. Her Cast is also while good not very damaging. Basically, I see her Boons as good but not on their own, like any other god (except maybe Hephaestus). Which means I don't normally take her Keepsake in the beginning of the run and for the second zone on I have better keepsakes to equip most of the time.
So what weapon is the best with Demeter specifically? Good enough to be a reason to take her keepsake?

[brickey.8]

For primary attacks, I think the only place that Demeter's attacks are ideal is on the staff or dagger's special attack. That lets you shoot once to freeze an enemy and then move in to do real damage with your primary attack. But doing so is hardly going to be the focal point of your run. Otherwise, she's solidly middling on damage and above-average on utility for any weapon.

Personally if I'm making a Demeter-focused build it's going to be a cast-focused build. Her cast boosts are always useful, especially if you stack them with other things that boost your cast or work when attacking people in your cast. The slowing vortex notably doesn't interfere with the other freeze effects.

That all said, I almost never use the god-forcing boons except Selene's. I like getting different gods each run, and once you have the rarity-boosting arcana cards online boosting one boon's rarity seems trivial compared to other keepsake boosts.

[Josqua]

I mainly use demeter for the Freeze CC effects with cast boon with the staff. You can make some broken cast builds with her for any weapon (as cast builds are mostly weapon independent anyway but the staffs aspect of melinoe or aspect of momus especially improve cast builds) you can combine boons from Demeter, Apollo and Zeus in a few different ways either to use targeted ranged casts with lightning lance, use this with Zeus' Ionic Gain or demeter's Tranquil Gain, or have casts that follow you with Demeter's Local Climate which works perfectly together with Apollo's Lucid Gain perk for magick recovery. Also out of the 3 gods' actual cast boons i like demeters best because it can CC well with freezing, unlike Apollo's Solar Ring it hits multiple times and unlike Zeus' Storm Ring doesn't only hit one enemy at a time, but all enemies within the cast range. Tho Zeus' storm ring does deal more damage to single enemies like bosses.
Well which ever cast you end up choosing, combine it with Prominence Flare, Super Nova, Zeus + Apollo Duo Glorious Disaster, Demeter's Gale Force and Demeter + Zeus Duo Hail storm for broken op casts. Other really useful boons of Demeter are Cold Storage (if using her cast arctic ring) and Snow Queen. Also Rare Crop if you dont have the arcana that increase boon rarity and/or plentiful forage if you have the spade with you. And her infusion boon can cheese the chronos fight, as his oneshot move will only deal 15 damage to you .... just to let yourself get hit by it on purpose and laugh in his face.
And if you use the cast combo that follows you the Apollo + Demeter Duo Boreal Gust also gives some good additional damage.

[hilfazer]

Mel Torches and Demeter on special. Then go for Cold Storage and duo with Zeus.

[Songbird]

Hestia + Demeter duo is insane on current patch, for weapons that can stack scorch quickly. Forcing Demeter just for that is not wholly unreasonable.

Demeter is pretty hard to take as your first god, but she's often extremely desirable to force for the second biome because she works in literally every build, thanks to her cyclone boons (and cast, if you haven't filled the slot) being so valuable for crowd control + Origination. Weed Killer is also excellent for a ton of builds.

Also, while it is extremely difficult to make happen, Frosty Veneer is probably the most powerful boon in the entire game for extremely high fear. Turn those 200+ damage Vow of Suffering smacks from the later bosses into 15 damage hits.