Also, should I use a 149 ballista or a 110 +1 gothic bow? I want to be able to solo CS reasonably fast (for a guided/multi arrowbowazon that is) without dying too much. I'll try to get a better gothic bow in the meantime.
I think Balistas are only usable(speed wise) with strafe. For a GA/multi zon you will want to go for the Gothic.
Your dream Gothic (bow) will have 20 ias on it to hit that coveted breakpoint.