after a long time making the acoustic of my recording studio right

Should i use the trident multichannel in/out directly to the Digidesign audiointerface in/out ?
or Should i connect my Digidesign audiointerface in/out directly to an external NPPA TT ?
And if i use a NPPA TT patchbay must be this one halfnormalled ? Top or Bottom halfnormalled ?
I send a pic of my Trident patchbay, can someone tell me what's "Tie lines" made for ?
Thanks a lot and sorry to be confused
