You'll probably need to get stuff made specifically to unravel, until you gain into the 60s or so.
If Mage Armor still counts as a property when you unravel, and you have a high level smith. and some ancient smith hammer +10 to burn, try making exceptional samurai jingasas to unravel may work, especially if you use your minor amounts of skill to imbue low-end properties, that use 1-2 citrines, before you unravel (and if the difficulty's around 35-60%, you'll have a good chance for a gain from that too). Eventually, you'll get where you can unravel the better stuff, and it will eventually start rolling forward better.
Part of your problem is the change in the loot system since Imbuing was introduced (and I missed most of it due to family health issues), and the way loot works now even the most minor creatures can have loot too difficult to imbue. In fact, based on my own recent return to fishing (cleared out about 20 of my 45 SOS last night, some of them which had gathered dust since 2012-13), I'm pretty sure that you'd have a hard time even with level 1 SOS chest loot (normal SOS produce random chests Level 1, 2 or 3 - you can tell the level by how many 10s of thousands of gold; the ancient SOS chests are level 4. And, I don't think the loot property caps have been changed for SOS the way they were for monster loot and T-maps).