I will have to recommend you try Long tentacle anemones, in all of my experience they are the only anemone I've never killed. They're a lot more resilient to physical damage, mine got caught in a wavemaker 3 times and is now looking better than ever! I have also never had problems with mine and water quality, they tolerate all sorts of different parameters.
Another huge benefit is they stick to the sandbed, so if you have a tall rock structure SPS won't have a problem. Keep in mind, LTA's get HUGE (15"+) and you'll need to account for that. In a 125, I would go for 3-4 in the beginning and as they get larger rehome them.
Another cool thing about them is almost every type of clownfish has been found to be hosted by LTAs, even percs and occs! Another cool trait about them is they're tentacles don't deform over time like with some BTA's, they stay straight forever and don't get ugly.
I would consider LTA's for sure, either in addition (not recommended) or on they're own (recommended). In fact, I'm planning on starting a harem of skunk clowns when I can get my tank stable again.
Good luck and God bless!