The durability thing means nothing, relayered items don't reduce in durability.
My arguments are all if you are gearing for the
end game. My points are not valid if you're talking about early game or the early-mid game. But they are useful for those who want to be a bit more efficient and plan their relayering a bit better from the start.
General UOEX hunter's progression: Early game relayers are to get to 220 dex help max things like LRC, LMC, FC etc. In the mid game it's all HP, how much HP can you get without losing those early game stats? The late game is just damage optimisation. The SoT only fits into the jump from early > mid, It doesn't help in the long run.
Relayers are only really needed if you want to go hunting. As such they need to increase 2 things: survivability and your damage rate. Beyond a certain point there are significant diminishing returns on the survivability front (outlined below).
SoT is an OK relayer for a new player, I would never relayer more than one. The key reasons why the SoT is actually a bad relayer (I've sold all of mine long ago) are as follows:
1. HP is redundant.
2. SDI/RPD are the most important stats.
3. Having 70% Physical resist in your final build is sub optimal.
Beyond 450ish HP, HP is actually a redundant stat. Which means the actual most important stats in the game are ranked as follows:
1. SDI
2. RPD
3. Strength
4. Enhanced Potions
5. HP
6. Who cares... as long as they're maxed.
3-5 are all actually related stats and could come in equal third really.
In the end game, spell damage is king. This is why there's an argument to keep gleam aura legging's in the optimal build. Reflect Physical Damage is just insane as well. These are your 2 main ways to deal additional damage. With a good weapon SDI adds a fair amount of damage. RPD is less versatile (some situations it is invalid or does nothing) but when it works it is incomparable to any other form in the game. Walking around dealing 1100+ damage per hit is pretty hard to top... as I said, in certain situations. This is why Jewel of Winter (overmax SDI and RPD) is better than all relayers including titan's hammers, although interestingly an all JoW suit would be much worse than an all relayers suit.
SoT not adding SDI is the reason it is not used at all in the end game.
The final reason is the 20% Phys resist. An end game suit should not have more than 50% Phys resist. As I said earlier, beyond a point its all damage output and your RPD is your primary or secondary way to support that, depending on the area you're in. Your HP is a resource that should be spent to increase damage output. I much prefer to take 450 dmg off a minotaur than 350. Taking 100 less damage from an AI hit means 250 less damage on him. Why would you willingly cut off the opportunity to deal an extra 250 damage per hit!? I know this is close to best case scenario, but even in S'gail taking an extra 20 dmg per hit means dealing an extra 50 dmg per hit. RPD really stacks up in situations where you're mobbed by mobs that use physical dmg. This is the reason you should really cap your phys resist at 40-50%. You WANT to take damage. What's the point in having 600+ HP if you don't USE it up? I want to actively be hit for as much damage at a time as I can.
For reference when I have Protection cast my phys resist drops to 34 these days, I've had to buy a few new relayers to get rid of excess physical resist. I'm finally at a spot that I think works nicely. I have a weapon for tough spots which naturally came with 18% Phys resist to bump it a little higher (nice that it was also a natural 5x58 too

), so I use that for farming places like Wrong, or if I am solo in Sgail. I can also turn off Protection to jump back to 44% at in tough times.
For this reason as well, SoT is a bad relayer. It gives you all that juicy HP, but then ensures your phys resist will be maxxed, making all that juicy HP so much more worthless.
The times when SoT is good: The one you wear on your head, un-relayered, is a good one because it's cheap. It has the third best HP boost out of all items in the game, so it is good. In the early game I could justify buying a SoT relayer to help break into the 400HP range. But buy it knowing you will eventually sell it as you move into the end game.
Other than that, they are pretty bad. There's a reason the market is flooded with SoT relayers.
-John Warren