I have a very similar situation as you, however read the stickies in this forum for the additional labs you should include with your post because that'll help you get some good info from the experienced guys in here.
So far in my journey to biohack my issues I've seen 4 separate docs and still the most valuable and insightful info I've received has been from guys on this forum.
I've tested low for pregnenolone and at the same time "in range" DHEA around the same as yours and I'm treating it now with Preg supps while also seeking the cause of it. I take 50mg daily and you can buy this stuff OTC, it'll help A LOT with the brain fog and memory as Preg itself is mainly used in the brain when not cascading to other hormones.
Pregnenolone is metabolized inside the mitochondria, mostly within the adrenals, so you could be looking at adrenal disfunction which is known to be caused by high stress, or at a deeper level mitochondria disfunction since this is where Preg is metabolized from cholesterol, and this mitos disfunction could have been caused by your autoimmune issues which are also a type of high stress on your body.
Your FT3 to RT3 ratio is low 15.5, should be over 20 according to http://www.stopthethyroidmadness.com/rt3-ratio/ but that may be causing your low energy levels. I also had a similar RT3 issue and working on a treatment now. Also read KSman's thyroid sticky and pay attention to the part where he talks about recording body temperatures because this will give you a good lead on any issues you may have regarding thyroid and adrenals.
My T levels were similar to yours, lower TT but higher FT, however haven't jumped on TRT as I'm still digging deeper in to the cause of them.