I can see some little confusion about grouping this wide range ...
using geographic criteria they should be, from West to East :
<li>Monti Lessini - bordered by the Val Lagarina (Adige river), the Vallorsa and the Val d'Agno
<li>Pasubio - bordered by the Val Lagarina (Adige river), the Val d'Agno and the Val d'Astico
<li>Sette Comuni (Asiago) - bordered by the Val d'Astico, the Valsugana, and the valley of river Brenta
<li>Monte Grappa - between the Brenta and the Piave rivers, and the Cismon valley
<li>Vette Feltrine - between the Piave river, the Cismon valley and the road from Primero to Agordo
using hiking and climbing criteria there is, joining the N part of Lessini and the S of Pasubio, the Piccole Dolomiti group