blade and soul taiwan mudfish nodes, doesnt improve my ping at all, and it makes it even worse than not using mudfish at all. contant high ping > 250 and keep dc. if not using mudfish is below <250. i used to use pingzapper and got <100, thought mudfish can get better too. 
do you mean I have to upgrade my speed ? does upgrading my speed to 20mbps helps? right now i have 14mbps
Nop. Upgrading your speed doesn’t be helpful at all because normally this issue is related with your ISP itself. 
I think chaing your ISP to another would be more helpful if it’s possible.
I’d set a trial credit now for your account. So I think you can use all mudfish nodes and features for a while. Please let me know if there’s any problems and questions.