Currently the athen and spart healer is named ἰᾱτρός iatros “surgeon”, but mace, ptol, sele have ἱερεύς hiereus “priest”. It's better to standardize it for all Greek factions and I think iatros is the more appropiate term.
(No accents per https://wildfiregames.com/forum/index.php?/topic/25202-transliteration-of-ancient-greek-into-english/page/3/&tab=comments#comment-378658 )
Furthermore, this patch renames the rome healer from pontifex “state priest” to medicus “doctor”; see https://code.wildfiregames.com/D1999?id=8542#inline-39450
Also added a generic name for the brit and gaul healer.