The Scottish union has just announced tenders for a semi pro level below Pro14, they are calling it 'Super Six' as a working ***le. The teams can be current BT Premiership teams or amalgamations. Salaries will be £12000 per player.
They have also announced that below this, the game will be strictly amateur, to stop clubs over stretching themselves in trying to reach the top.
The WRU should do the same, base it around 6-8 teams and allocate the U23 academy players from regions to each team.
Central Belt Team (could ground-share at St. Johnstone FC)
Highlands (could ground-share at Inverness Caledonian Thistle FC or Ross County FC). The former would be my choice as they will need extra funding if they do not return to the SPL in the next few years. A ground-share could save them and help the development of rugby north of Inverness as well.