It all depends on the set up that plays to the strength of Rondon.
Use him properly and he could become a worthy number 9 that we've all been accustomed to over the years. (obviously not the latter years)

If we could do a straight swap for Gayle or at least close to it with sensible wages ( as sensible as the climate dictates in today's mental market), then it's a no brainer as long as his strengths are played to and he's willing to take on the pressure pot number 9 mantle.