Evolution should be used only when a problem will not otherwise converge. You should always try solving the problem without evolution before deciding if you need to use it.

If your problem does not converge, try simplifying the problem. For instance, if your problem is nonisothermal, try solving the isothermal version first and then start the nonisothermal calculation using the isothermal solution as a starting point. If this doesn’t help, or if your problem is already isothermal, you should consider using evolution.