Both Bane and Cold DoT Occultists greatly benefit from the new Vaal Caress Gloves, as they run 4L Vaal gems.

Bane

For Bane, Vaal Blight receives hefty buffs from running Vaal Caress:

Let's say you get these at level 32 (very unlikely), you have Vaal Blight Level 10, Void Manip Level 8, Efficacy Level 8 and Swift Affliction Level 1. You're a Witch with a standard Bane tree (Atrophy, Whispers of Doom, Melding and Arcane Expanse). Compared to Apothecary's Gloves, which you can't get until much later, and are gonna be BiS for a while, you get a +194% dps increase on Vaal Blight, and +3 AoE Radius (which is no small thing).

Previously at level 86 after week 1 (didn't get to play much) I had 19/0 gems, a normal setup with 5L Cane, Gull, +1 Chaos Ammy, and swapping my Apothecary's Gloves then with this would've given me +48% DPS on Vaal Blight.

Even later game, with 21/20 gems and Awakened Gems, you go from 108k vaal blight with Apothecary's Gloves to 140k vaal blight (+29%) to 177k vaal blight (+64%) if you get these with the sweetest double corrupt (+2 AoE, +2 duration). In fact, any combination of +1 all, +2 duration and +2 aoe will be a nice upgrade.

Cold DoT

For Cold DoT I just took a Day 1 PoB for the #1 Cold DoT occultists, which runs a 4 link Vaal Cold Snap in a Rime Gaze. If you instead put the 4L Cold Snap into these gloves you go from 418k DPS Vaal Cold Snap to 511k DPS Vaal Cold Snap, that's a 24% DPS increase.

Alternatively, taking the PoB of a Level 80 Cold DoT Occultist that has a 4L Vortex and a 5L Vaal Cold Snap Setup with combined 257k DPS, we can switch it around, add Elemental Focus as a 5L to Vortex, take out Bonechill from the 5L Vaal Cold Snap and put the Cold Snap into these Gloves, and achieve 372k combined DPS (+44%).

Alternatives

There's huge potential in these gloves for League Start. There are other notable mentions:

• Vaal Arc
• Vaal Spark
• Vaal Summon Skeletons

I'm not so sure about Vaal Rain of Arrows or Vaal Spectral Throw, as I've not seen them used as secondaries, really.

Edit: The versions of the gloves I used in the PoB calculations above DO account for the loss in support gem levels. However, you have to change the wording to say "-5 to levels of socketed support gems" in the item description for it to work. Non-Vaal cannot be parsed by PoB.

Edit2: Vaal Summon Skeletons

I'm not good with Skelly builds, but using a Day 1 Zombie 6L Necro with Vaal Summon Skeletons in a helmet with +2 levels of socketed minion gems supported by Brutality, Summon Phantasm and Minion Damage, I looked at the PoB damage output. Using a conservative 20 Minions from Vaal Summon Skeletons, and swapping the 4L into these gloves, you go from 540k DPS to 705k DPS (+30% DPS). What's notable as well is the survivability of the skeletons. As they go from ~4100 HP to ~5500 HP by swapping into the Gloves. Definitely a worthwhile pickup, but we'll have to see how Minion builds end up doing.