I play thrower here and choose to not pvp since i dont want to run the gear that is needed to kill anyone halfway decent at pvp, especially mages.
If i would try to pvp on an archer here, i would go with yumi + bushido for doubleshots. Needs 150 stam at 35 ssi for max swingspeed, so its way easier to build a suit for that then for comp bow wich needs 210 stam + 60 ssi .
Yumi with hld,ssi,di, delayed hitspell, velocity or balanced as 5. mod. Repeater with balanced, di , hld , hitspell and whatever for moving shots. Try to max out str and di, high tactics and anatomy to maximize base damage. 140 dex for max bandage speed. Bushido mastery for +15 mana passive, elf for another 20.
Such a temp would still be rng based, but a lucky doubleshot with all hitspells can do around 60 or more, and suit for that is resonably cheap. First important thing against mages is to have max swingspeed + hitspell to keep interrupting them. If they cant cast that often, you take less damage.
With your current setup you probably swing your elven composite longbow at 1.75 speed, which does mean they have to deal with a hit every 3.5 secs on average. Thats simply to much time for anyone halfway experienced at uo, and i believe arnie is very good.
Agra-Lem