Fist of all, you should ignore what most archers in this mod tell you to do, as most of them still haven't adjusted to the recent changes(wpf rework/movement stun removal/stagger rework). Here are a few things to help you decide, but to be honest, all bows aside from the Short Bow, Yumi Bow and Bow, can be extremely effective in certain situations.
If you think that you're not quite the best shot, then go for the lighter bows. If you feel that you get focused a lot by enemy archers and are unable to adjust your playstyle to reduce how often this happens, go for a lighter bow. If you want to focus other archers(and therefore limit your effectiveness), chose a Nomad or Tatar Bow. If you want to hybrid with your bow, go for one of the 1s ones. If you're doing HA, use the Yumi, otherwise ignore it for all other cases. If you find that you're aiming at a lot of heavily armed infantry or horses, go with a two slot bow. If you're using a bow with 4PD or lower, don't(if you really must, make sure you use Tatar Arrows, not bodkins). If you really plan on sticking to DTV, I'd chose a longbow for the increased chance to stagger bots, something that could really help teammates.