Play around with your settings, including trying to disable texture caching. Allods already has scripts in place to do this kind of things. For example, if your connection is too slow (like 1KB/s), it will reduce the distance at which players and enemies are loaded. You have dynamic switching between high and low poly models. Decrease the distance for low poly if you have to.
You can also go to IoR and use the bank/auction house there if Yasker's Tower doesn't do it for you. But if Yasker's Tower is lagging bad for you, I can't see you raiding or doing raid dominion. At least for me, my fps is lower there.
the options in allods sadly only concern rendering, but not network, so not rendering all these players will only help if your computer is the bottleneck, however if "your internet" is the problm it wont help at all since all players are still loaded, while not rendered
however what allods will do, is if a slow connection, no players will be rendered regardless of the settings, and only NPCs will be loaded. interaction with them has a 12 second delay then
its interesting that the "big load" of data is only a burst however, because when monitoring network traffic you will see its like 50KB/s for a few seconds and then goes back to only 3 or 4 KB/s
if this burst cannot be recieved in a set time, the 12 second-lag will appear
im sure if anyone of the gamedevelopers will read this he knows what i mean