Use APM variable in redirect ending for VPE

Trying to clean up my VPE, would like to create a handful of macros and have minimal endings: allow, deny, redirect, etc.

Is it possible for me to use a variable on a Redirect ending in the redirect URL box? Does it take TCL at all? I was hoping to just use a redirect to https://{[mcget {session.server.network.name}]} or something. Maybe tack on a URI variable also.

Worst case scenario, I could use an iRule on ACCESS_ACL_DENIED if I'm not able to do this in VPE, correct? Any other events I should consider?

Also, are there any limits on Macro calls in a VPE? Nested Macro calls? Not trying to do any loops or anything.

Thank you.