To be honest, all healers are mobile enough now, the extra you have as a monk is transcendence and tiger's lust (because you can give it to somebody else, only priests have that).
Displacer Beast, Ghost Wolf, Feathers/Body&Soul and Divine Steed are all equivalent to roll in some way.
So I think saying Monks are mobile healers is a myth at this point.
Anyone did tests with the monk crafted neck? Is it worth it? Self heal with roll seems odd.