I tried one on siege prior to the skill mastery changes.
I Went:
120 (115 +5 veil) throwing
100 tactics
100 anatomy
120 mystic
120 focus
120 bushi
45 chiv
Totally did not work. Not enough damage, RC was cool but he outdamaged me. Enchant weapon is negligible. Probably on a prodo shard with end game top tier equip it *could* do similar dmg to a standard ABC, but i ended up dropping mystic and focus and picking up resisting spells 120 and maxing chiv tac and anatomy.
Now with the new mastery system, perhaps, you could go 120 mystic instead of throwing and use mystic mastery and completely rely on consecrate weapon and lightning strike instead of AI.... gosh its a weird idea and you cant really rely on offensive mystic spells at all, but If i WERE to do that id go....
120 (+5 to balance mystic weapon) mystic
120 focus
120 tactics
120 anatomy
120 bushido
80 Chiv (must have consecrate weapon up all the time for this to “work”)
60 points of whatever. Possibly reduce anatomy and tactics to 100 and take 100 healing?
Seems inferior to either a mystic mage or a typical ABC archer
Downsides: you have to be a gargoyle.