Ehh for TI, rudra is fine since a lot of OAB's effectiveness comes from the 50% damage of steel arrows and the strength of the steel arrows itself. If you really want to invest and bow/arrow swap, you can make a 2x clam +cruiser and a 2x + cruiser insecticide xbows that will do a lot more damage. Or if you want to be cheap, clam/cruiser/insecticide bow will work for everything and looking at the damage calculator, you'll end up needing an extra 3-4 auto attacks at 80 dex to kill each of them compared to the other bows.
But in my opinion, OAB is superior for leveling since it's essentially a +50% modifier. Back in the day, I used 2 Battle Ground Accessories, so my auto attacks were naturally critting and you can basically go anywhere with it. Of course, you'll need a priest to make the best out of it with aspersio and stuff.
edit: if you do want to obtain one, try and get yourself to +6-7. I had a +10 on chaos and that was OP in NI2