Richard, the only thing I can say is play with them and see what you get.
I found that Hazel on an Ivy hearth works quite well as it does on Lime as a hearth.
If you want to get suicidal then try getting ash on a Ivy hearth going, it is a total nightmare
Somewhere I have a list of all the woods that people have had success with in the UK (basically all the ones that people have recommended as being easy) and generally people have been right.
After not having done firebow for a long time (years) the first time I picked it up again was Hazel drill and Lime hearth and about 90% of the people there managed an ember, I was pretty amazed. In the end it is trial and error and as I say with Ivy it needs to be well seasoned and in the drills case has to be round (I had a drill that was elliptical and that would not work no matter what i tried, in the end it joined its familly back in the woods
)