You know the problem with being here on thePlenty so often over a fairly long period of time? I do know that we have talked about it a couple of times but I am too frightened to respond to most questions we've covered before, like this one, because I might totally contradict (several times!) whatever I've said on the subject/s before!
I think I initially thought that the Others had been in the employ of the PW. It may certainly be one theory as to why they have managed to survive while both Elderlings and dragons have near vanished over the years?
I think I may have even given the PW as a possible reason for their odd request for gold in return for their seeing/prophecies eg gold coins are placed on the tongue of an Other, such as what happened with Kennit right at the beginning of SoM, and I thought that the Others may have passed this gold on to the PW to furnish her destruction-of-the-world plans. She had to buy expensive Skill scrolls from Regal etc with something?
I also think I may have considered her due to the iron bars that kept She Who Remembers imprisoned (the ones that Wintrow removed allowing her escape). In some way I felt (and still have a niggle about it!) that there may be a link with those bars of iron with the ironworks near Forge, and maybe even the Elderling ruins in the wider region of Forge/Buck. I think I may have included that I'm not sure if it's only coincidence that Forge was also the first town to be Forged en masse and that Fitz chose to settle near there (though I think I recall that the 'thul beings believed that Forge as a get-away-from-the-world option would afford Fitz and Nightyeyes more privacy as people no longer wanted to go to the area).
Of course there is always the fact that the PW is not the true White Prophet. Did she need the farseeing of SWR to help see what was to come, or could she see certain aspects by herself eg that she saw in all times that Fitz always killed her once she'd done away with Beloved? That she ends up on Aslevjal, that is said to have a female, black-haired oracle, is interesting as Others Island, too, is said to have a female, black-haired oracle (have chatted about that all over the place, I think!

). Maybe she had an interest in both locations?
The more we go along though, I think I believe less in an alliance between the PW and the Others. A little niggle in me believes that we may yet discover that the Others are actually like the many other abomination-like characters that we have met in the RotE thus far eg Thick, the Tattooed, the children marked by the Rain Wilds who should have been exposed when young, Pecksies etc. Ones who seem less, or who are looked down on by society, have this way of flipping things upside down and eventually prove to be more than worthy and even heroic. Maybe they have, or will in future, performed some deed/s that will require the dragons to look at them from a different perspective? They will be made to realise that the Others are not the Abominations they thought them to be?
I wonder if the Others are not possibly charged with protecting the artworks of the Elderlings...maybe even for future Elderlings should Elderlings ever return to the world? Like protecting the Elderling past as well as the Elderling future? As far as we can tell (?), the Others are unaware that Elderlings have returned...though one has to wonder what they thought when they realised that Fitz and Dutiful were able to come and go via the off-shore Skill Pillar and did not need to come via boat anchored near the opposite shore and over the ground memory stone path (or at least I *believe* it is constructed of ground memory stone) through their magic-imbued forest?
As the things that wash up on the Treasure Beach appear to prophecy a future (much like other pieces such as Althea's egg from Amber and Wintrow's stained-glass window etc), possibly the Others go one step further and even protect the future itself so that it happens as has been prophecied within the pieces? Of course, the events that have taken place as prophecied by the pieces have only seemed to have taken place for those those who have kept the items (Fitz - Rooster Crown feathers, Etta - baby with serpent tail, Dutiful - the Narcheska figurine, Wintrow etc) and not so much by those who left them behind/had their items stored in the alcoves? In this, maybe the Others do have a sinister intent in that they do not want events to occur and thus they keep them from taking place by keeping the artworks on the island? The events not having been able to occur, maybe this has kept time's wheel within it's current rutted path? Along with most of the other items, though Kennit did find a figurine of Etta, he did eventually return it. While he was with Etta and did have a child with her, and she did love him, he was not the one who ended up with her. Instead, it was Wintrow...at least in the sense that he is with Etta now and Kennit is dead.
I just don't know. Despite the fact that Fitz was repelled by the magic of the Others' path and forest, just as he was by the magic within the Liveship that he and Nighteyes came across while they were in Bingtown or even the magic/Wit within the simulacra in the Stone Garden, the Others do seem to have helped Kaven Ravenlock (loving that black hair connection by the way!

), who went to Others' Island and returned in his minstrel-like fashion? The fact that he sounds minstrel-y, even kind of White Prophet-y to a certain degree with his true songs of the future that were told in twisted rhymes (I think?) links him more to Elderlings and dragons than anything else? Leaving the path and entering into deep into the territory of the Others may even provide an experience similar to drowning in memories? What ever they did to Kaven, they certainly didn't seem to have harmed him, and let him leave rather than imprison him?
The Others...I'm looking forward to getting back to a LST re-read one day not too far away...so many mysteries to dig into!
ps Nothing with our Tangle leader is 'obvious' I don't think!

She's a tricky fish!