Witch hunter like profession?
Thief has lotsa Archery and Dark Magic type skills (or Denial Magic as lore would have it I guess.) Lotsa ways to shutdown pesky mages and uses tons and tons of poison.
Ranger is just all pew pew and doesn’t really have noticeable magic spell type skills.
Ele if you just want all the magicz ;o
The best anti-mage witch hunter in practicality would be Guardian though but that would be more on the lines of Dragon Age Templars. Possible they’ll be getting bows in xpan.
Thieves have magic? Since when?
You just get a few shadowy sprites while activating some abilities. The shortbow is not at all close to what you’re looking at since the thief shortbow has no viable or even reasonably-decent build using it as a main weapon, since it offers overall fairly low damage and is entirely designed as a utility weapon.
There really isn’t one out there. I’d say just go ranger for the archery, or ele for the magic. Guards and wars don’t really fit the bill with the armor, but warriors do shoot fireballs from the bow, making it the closest I guess?
https://forum-en.gw2archive.eu/forum/professions/thief/ES-Suggestion-The-Deadeye-FORMAL/
Hmm I vote Mesmer ~~ because of reasons and logic (actually I just always suggest mesmer)!
More seriously… If HoT does give guardians longbows that would probably be the best match