I don't own a terrapin and I'm not going to buy a ####ty one. My shooting spot has 8" steel beams to range off, so it's quick and easy using what I've already got.
Your lrf won't help you measure out corrections either. So if you have to choose lrf or ranging reticle id go reticle for that reason alone.
A ranging reticle may work at your spot with 8" beams but doesn't work ANYWHERE in the field. For a ranging reticle to be accurate, you need either the target dimensions or reverse, the range to get your target dimensions. Good luck using that reticle at any UKD.
I would take any POS rangefinder over trying to accurately range past 500m.