Ranger Questions - New Genesis

Hello! So I am a ranger main and am having some problems:

With a controller how do you lock on to a monsters weak spot, especially the really big ones? I always hit their feet.

With the resurgir weapon a side stop is just hitting the right trigger when locked on to an enemy right?

Thanks!

@FRZA45 There's an option in the settings (I don't recall if the default is "on" or "off") that lets you choose a button/action (such as using the right control stick) to change your target when you're locked on. You may need to reposition so that the desired target is closer to you as it seems to prioritize proximity rather than "scroll through target options," although it does at least seem to follow the direction the control stick is pushed in.