Additive synthesis vs. "just draw the waveform"
If your goal is to get a sawtooth wave, then additive synthesis is a bad way to go about it as a sawtooth wave is a superposition of an infinite number  of sine waves (in the continuous case).  Many instruments, particularly woodwinds, are well modeled by a relatively few sine waves.  The exact mixture determines the timbre and thus what instrument it sounds like, e.g. an oboe as compared to a clarinet.  Violins, however, generate a slip-stick motion that is more like a sawtooth wave and thus are harder to model accurately and efficiently with additive synthesis.

Unless you are going for an "electronic" sound, I would say using LinTable by itself would be a somewhat unusual thing.  However, using it as input to a filter would make more sense.  For example, if you did use a sawtooth wave to model a violin, you'd almost certainly pass it through a (among other things) low-pass filter to round it out a little and change the timbre.