Your next upgrade is definitely that belt. You should be looking at an IK belt with around 250 str. Pretty sure you can get one at a decent price as you don't need vit.
I noticed you have no crit chance on helm or bracers, some more crit chance may help your dps.
I'm pretty sure an IK helm with 6% crit and ~170 str is going to give more sheet dps than your mempo. You'd probably have to replace pants as well in order to get the lost resists back.
As I do not play on US servers I don´t know anything about the prices there but if your runs feel slow you should aim for more dps. Seeing as you are not running the 5P set bonus off IK set I would personally get a witching hour with str and stam on it. I would also seeing as you are not on a hig budget buy a pair of yelllow bracers with good stats on them (hig crit ressi vit etc) and then get innas pants with str on them instead of the leggings you are currently using. This should yeild a higer dps than with those pair of lacuni´s have atm. Ofc I don´t know if what you have is enough for both but imo its something you should be looking into if you want faster runs aka wanting more damage.
PS. remember you can always get the LS you need from bloodthrist if you drop the LS on ya belt.
I would say buy a new Echoing Fury, search for something around 1100+dps, Str 100+, CritHitDmg 70-100+.
You will lose some critical hit damage but the base damage+strength on the echoing fury will boost your damage nonetheless, this would also allow you to find a better yellow stat weapon to go with it, with Strength/lifesteal/crit damage/socket, even if the dps is lower on that weapon it will be better for you.
IK set helm will be great for you aswell, you'll gain 5set bonus + Crit Chance + reduced melee damage which would probs be better for WW/RLTW-(which you should reconsider your skills, especially the cleave)