There are not any codes which are very complete when it comes to analysis of vortex shedding on guyed stacks. There have been very few instances where guyed stacks actually vibrate, and even in the rare cases where I have personally been involved, the calculations still indicated that there was no problem. The best advise that I can offer is to avoid the situations which I have seen that led to wind induced vibration:
1) Top guy wire too far down from top of the stack. I try to keep the top guy wire as close as reasonably possible to the top of the stack, usually a few feet or couple of meters.
2) Structural bridge strand was used in all cases where I have witnessed vibration. I think it is very stiff and provides little damping. Bridge strand can be used, but the combination of a guy wire that is far from the top and the use of bridge strand is a dangerous combination.
Our MecaStack software does consider vortex shedding, but since the codes don't do a great job at addressing this for guy wire supported stacks you should apply good engineering judgement.