Resource Groups and sequencing resources within routes (Non R2)

Issue is customer has a simple two step route, each with a resource group which each have two resources within them.

10 Route Step 1

20 Route Step 2

ResGrp1- Resources-Line A, Line B

ResGrp2- Resources-Line A, Line B

The customer wants a specific sequence to occur once MPS has chosen resource based on capacity.  Meaning, if Line within Op10 is chosen then Line A of Op 20 must be chosen, so forth for B as well.

I see sequencing and sequence groups in R2 and since this is a process industry, great, but not on R2 at this client.

Is there a chance to use capabilities here?  Is there a checkbox or parm we are missing?  Best practice suggestions needed here please.

Thanks in advance