Should I get the 20mm or 24mm f1.4 to pair with my 85L for events in a dual camera setup.

For events, most likely weddings I have been considering getting either of those 2, I already have the 50mm and consider the 35mm too close a focal length. I already have the 24-105L and a Tamron 21-39mm f2.8, and I find I usually use the wide zoom at its widest setting anyhow. But this sample picture is giving me pause, seeing how much I would need to crop to get even close to 28mm.

Anyone else using a similar setup?

If you keep the 50 as the single closest prime I would pick the 24
If you keep the 35 as the single closest prime I would pick the 20

But it still totally depends on what you would like to shoot with it

What you also can do is buy the 24-35/2.0 Art and don't buy a 35 and 20/24

What Bonbridge said. I have the 24L, 50L and 85L combo and I find it to be a good spread of focal lengths. For anything in between I have the 24-70 f/2.8 MkII and for longer the 70-200 f/2.8 MkII. I've found that I'm not wanting for anything else with that set up.