wwhitney
In the Trades
Something like below, although it seems a little busy with all the bends.
One more thing that may help: the WC is not subject to the trap weir rule, as it is a siphoning fixture. So you can have your single sloped plane for your horizontal wet vent, and the WC drain could pass over it, then drop down and join on the horizontal. [I think conversely the horizontal wet vent could pass over the WC drain, then gently jog down with a 22-1/2" offset to join the WC drain, but that may be subject to debate.]
Cheers, Wayne
One more thing that may help: the WC is not subject to the trap weir rule, as it is a siphoning fixture. So you can have your single sloped plane for your horizontal wet vent, and the WC drain could pass over it, then drop down and join on the horizontal. [I think conversely the horizontal wet vent could pass over the WC drain, then gently jog down with a 22-1/2" offset to join the WC drain, but that may be subject to debate.]
Cheers, Wayne