Use Mozilla Firefox...I used Google Chrome and I haved lag (about 20-25 FPS).I changed some values that actually speed up Mozilla and I increased cache memory (500Mb)...And I play about 30-40 FPS on my slow laptop...If it doesn't work change screen size and uncheck all in Performance (not Show battle chat if doesn't lag)...There are some videos called How to speed up Mozilla Firefox.Hope it helps!

Which is the best weapon for playing solo game with good damage?