I use all this attack techniques and work quite well against bad or average shielders.
Still meet some great shielder (Cyber,Kansuke,Kingrimm,Dima,Olwen...) in battle is worst nightmare and only rational reaction in this situation is run away.
For fighing best shielders you need shieldbreaker weapon, very good blocking skills and hope for best after shield broke, because best shielders are usually great in manual blocking, too.
And most important thing: use good helmet.