ok so you know there are 2 kinds of mults - passive and buffered
and you know that buffered mults are more accurate
good start...
in almost all cases other than for v/oct it really doesn't matter if your signal is slightly off - you will not notice at all
unless you have tuned your modules, even with v/oct it won't matter
in very rare cases - some of my video modules, for instance, don't like maths unless there is a buffer between them - which shows up by maths not cycling and a buffer solves this - in which case get a buffer
if after all that you still want a buffered mult - take a look at mi links - you get a buffered mult and 2 mixers (one of which can be used as a precision adder - so can also be used as a 2 output mult)
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities