SN Processing Routing

Hi Everybody.

Could you tell me how you typically route:

SN and Under SN mics:

I wanted to do this:

SN SNUnd
|(70%) |(30%)
/
Merged in One Channel
|
Compressor
| |(Send 30%)
/
/
CleanSNOut
|
Out Gate
|
Reverb
|
Out
Question is ow this is typically done?
Should i not initially mix SN and Under SN together?
Should i compress before sending to Gate?
Or shsould i send clean (SN/UnderSN mixed) to gate instead?