This is possibly a spoiler and definitely metagaming, but one of the limited number of reliably-located, disenchantable enchanted 'dual effect' items in the game is:
Spoiler the Steel Battleaxe of Firey Souls, located in Ironbind Barrow, just off the road from Whiterun/Windhelm to Dawnstar. It has a single effect in terms of 'you can disenchant it and it counts as a single effect, meaning you don't need the extra effect perk but if you have it you can couple it with something else', but does two things - 10pt of fire damage (regardless of what soul you use and what you do with the 'charges' slider) plus soul trap for X seconds (depending on the soul and the slider). Phenomenally useful as soul trap really only needs to last one second on a weapon, as if you don't kill the enemy with any given hit, you'll probably have to hit it again to kill it (maybe go for 2-3 seconds if you're using followers who might also get in the kill while you're preparing for the next hit) and you always get the 10pt of fire damage, so you can make a pretty useful weapon that lasts a decent number of hits before needing to recharge with a low skill and petty soul, or a very useful weapon that lasts aaaaaaaaaaages with a higher skill and grand soul. Of course, at higher levels, 10pt fire damage isn't great, but by then you've probably got good enough weapons that you don't massively need the extra damage, and it still gives you that slight edge over not having it, plus you still get the soul trap effect.
It does occasionally fly around the room, especially if you're using shouts, so if you can't find it (the UESP tells you where it is normally positioned) make sure you look eeeeeeverywhere, I once spent about five minutes looking for it in a modded game where draugr use Shouts much more, and I already had all three words of Unrelenting Force.
Do you mean with Acquisitive Soul Gems Multithreaded? With that mod, they will only go into the correct sized gem (common for common etc). So, you do miss out on the odd soul because it won't go into a bigger gem, but on the other hand you don't waste good gems (or have to mess around dropping them) on rubbish souls.