Tried it, works for SD. Without can barely mc 2, with 10 with messiah than 2.

I login with whatever... For some reason is bugged as it often DOESN'T login with ur settings picked so manually check / change.

Login with whatever options.
Settings - graphics
High fps limit 10
Lagkiller high lim 1 low 0 (putting lower lim helps noticeably)
Pixel depth <<< set to minimum avail
Lowest graphic setting
No checkedboxes at bottom but second and last choice top to bottom in left hand column.

Then...
Settings - display
uncheck as many popup boxes as possible. They will noticeably lagyou out in combat.

This all sounds simple but tbh is funny how many don't play with these settings and just rage.