As a front three indeed, having scored 114 in all comps so far this season, but RM's three main forwards (Cristiano, Benzema, Higuaín) scored 118 goals amongst them in 2011/12, though they weren't really a front three, as Benzema-Higuaín would mostly interchange starts/subs.
That season saw Higuaín in his deadliest scoring form, a goal every 79 minutes in La Liga (Cristiano every 73, Benzema every 108), making them responsible for 89 league goals together. The current Barça trio are at 78 league goals so safe to say they won't match or surpass it with only 2 league games left. To compare: Messi this season a goal every 80 minutes in La Liga, Neymar every 108 and Suárez every 136. Though what sets the Barça trio apart is their number of assists between each other (well, Messi and Suárez anyway).