I tried to make a viable Arachyr spec but basically you probably just do something like throw Widowmakers the entire time as main DPS and you only use Vampire Bats to tank or regen because of the bracers. Spec into physical to boost those, maybe along with simplicity's strength. Still not that great I don't think. especially not HT for pushing GRifts. Maybe I'll try it out again sometime.
Also I can't seem to figure out Carnieval despite having near-Ancient armour slots on that spec. GR50 is sometimes a coin toss for me if I can finish in time, whereas HT is my shittiest set and I can go GR55-57 without breaking a sweat.
Spiders are single target, you can't do something good out of them only, even with area damage. You could potentially use the queen rune to direct the 2pc queen around, which would be quite useful as her aoe is fairly small otherwise, but you're not clearing high GR with that sadly. Toads are slightly aoe if you use rheno and explosive, but it's still not that great.
More importantly, I just remembered Helltooth also boosts those skills, by 100% more, so there's absolutely no reason to use Arachyr if you wanted to make a corpse spider or toad build because Helltooth would be better. Funny enough, it also affects Firebats, so even for that it's questionnable, the only advantage arachyr has is you don't actually need to firewall every 15seconds to get the dmg boost, and that's a highly debatable advantage if you use the wall of death bracers since fire wall does substantial damage on its own. I feel this is one aspect that is particularily stupid, Helltooth buffs the same skills Arachyr does, but for more damage. Only skills it doesn't buff are Angry Chicken and Locust Swarm but neither are relevant.
So for arachyr to be viable, they also need to buff Arachyr, I forgot about Helltooth overlapping, and that's especially true with Wall of Death being way superior to Hex as your option to activate the set bonuses and Necrosis applying a damage taken debuff on top of doing slightly less damage than the spider queen but on everything on the screen instead of a small aoe.
For Carnevil, do you have all the right rolls? You need attackspeed on the weapon and you definitely want attackspeed on the gloves too and if possible on the rings but the weapon is top priority. You also need to make sure you keep F+R up and apply the zuni debuff to stuff otherwise your damage drops a ton.
