Abilities that Still Apply when in allied Tahm Kench's W

I couldn't find a good list anywhere on the boards or other sites so I made a topic instead.

Tahm's W on an ally seems to block everything except damage over time/poison, which includes: Ignite Any champion with targeted Damage Over Time (Teemo, Cass, Brand, Swain.. and more)

There are a few spells I have not tested yet such as Karthus, Bard, and Fizz ults.

1. Karthus' ult - does it apply to an ally when they're in Tahm's W?
2. Bard's Ult - Would ulting Tahm affect the person inside his mouth? For example Bard's ult can deny the last couple seconds of ignite, would his ult apply to an ignited ally inside Tahm's mouth to stop the damage?
3. **Fizz Ult **- If he ults someone who is then eaten by Tahm, are they still affected by the damage? I believe Tahm takes the damage instead but I can't remember.
4. Caitlyn Ult - I believe Tahm takes the damage instead

If you know any other skills that have strange interactions with Tahm's W, list them