The 271 and 218 would have to be configured differently. For instance, if the 218 was on a network input it is not likely that you would want to have a track start playing at 87 but you would want Theater sources setting the DSP speakers to 87. The best way to get this to work the way you prefer would be to have a control system initialize each source select to the appropriate volume setting. This eliminates diving for a volume control when a Roon track starts playing at 87.

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#1 Trinnov Altitude 32-8-16, 271, 8000XE, 7200SEHC, 7200.2, Seaton F18, JL Fathom F113, Revel w990's, Kef R7, ATI 528 Amp, JVC RS4100K, SI screen. Roon Nucleus+, Eno AG, Eno M link, 218.
#2 Mark Levinson No5105, Ayre VX8 and CX8, Vandersteen Treo CT, Preamp varies.
#3 Meridian Ellipse