I use power armor almost exclusively in FO4. I am able to keep it well maintained and modified (recon sensors, jump jets or stealth field, red tactical light, extra carrying capacity).
The only time I step my character out of my PA is when I am back at The Castle to repair, rest, and barter, or if she has to step out to use a terminal in a building. Otherwise, my character wears the PA like constant second skin. Add to that, the fact that she wears the Grognak the Barbarian outfit which adds to her strength. With the T-60 modified PA, she is almost (almost) a walking juggernaut. At the moment, I have 98 fusion cores to energize my PA, and I have my perks set to where they pretty much double the length of time a fusion core will last. I don't think I have to worry about losing power for my armor any time soon.
I horde weapons too. Don't know just how many Legendary weapons and armor I have, but it is a lot.... more than I can count on two hands. I have a weapon on me for just about any situation. (Just about.) I have a Legendary assault rifle that causes a lot of damage, as well as bleeding damage...very handy against most targets. I also have an anti-robot shotgun. Pretty much any weapons I acquire, if I can suppress them, I do. I like to play stealthy when I can. My sneak is maxed out. I also carry a couple of swords which do considerable damage (especially poison damage, which comes in handy against larger targets like deathclaws and super mutants. I have many Fat Men weapons, and enough mini-nukes to glass a small country, but I really don't use them.
Right now, I am running the Automaton campaign, and where I normally exclusively use my companion, Dogmeat, this time, I'm having him sit out whilst I work with Ada, my automaton companion for this campaign. Once I finish this add on, I will go back to having Dogmeat at my side.
This game could stand to take a clue from Far Cry Primal, in that, after I have killed an enemy, it should not be a chore to try and find them. FCP marks kills as small Xs on a minimap. There should be a way to more easily find your kills in FO4.
