Optifine gets updated every now and then, give it a shot. It might just be working fine.
Static blocks don't really strain your performance, and I haven't played tolkiencraft so it's not a valid reference point for me.
I think that processes like mana generation, substantial ones, much like bigger machine setups in other packs, are much more of a strain on fps.
Even my i5 3k series at 4.4 ghz can only get me 100 fps in my base while on a new world easily over 200.
Oh and an i3 has 4 threads but 2 physical cores and I don't think minecraft is optimized for multi-threading.
I know of the cloth, but I need to keep the enchantment to put it on something else, "preserving it. What the auto-disenchanter does"
The auto-disenchater is able to remove an enchantment and produces book with the same enchantment.
I know Optifine gets updated, but after the last 4 or 5 times I've tried it, with memory leaks happening each time due to how it treats forge, I've specifically singled out that mod is not worth the hassle it caused.
Tolkeincraft has a LARGE number of NPCs. I think the number is something along 100 or so in the first town? as well as a number of heavily-scripted blocks and items. Material Energy caused almost no lag for me, and that came standard with a bunch of machines. I have noticed issues with Paving Stones of Warding, so I may knock a number of those off of my base, and just keep them in a small number of areas, may help with that.
I don't know. Try a test with one of the many hundreds of enchanted items you're gonna wind up with; who knows, it may work. Failing that, just use Infusion Enchanting, and Osmotic Enchanting to make the enchantments you want on what you're enchanting.
EDIT: Attempted Optifine's Forge-compatable 1.7.10, and immediate Memory leak and crash upon attempting to load my world. Fastcraft I'd turned off beforehand, just in case there was an incompatability. Glad I did.