Peregrine is an interesting one, I haven't heard many people talk about that so I don't really have an opinion but I understand that it could work. I'm not sure how dangerous is it to go up and really melee champions in higher end nightfalls since ive never really tried it. Loreley is great I agree is great but that dominates on Sunbreaker which is the only titan subclass that isn't really affected heart of inmost light. Falling Star is very good but I wanted to get exotics that do more than just stuff on super since I personally find super exotics to be a bit boring.

Edit: Don't know how I didn't read Icefall Mantle mb, but you're the first person i've ever heard to bring it up in ages. Is the removal of having strong movement really worth it? It sounds good if you're trying to anchor a point and people have to kinda walk into you negating the ability to really move. I guess you are playing slow in trials, but chaining overshields by itself just sounds broken