How to Be a Qualified Blade and Soul Summoner

Most of people say that it is simple to be a summoner, yes, compared with other classes the blade and soul summoner is very simple in operational aspect, and generally you can press the skill bar when it is lightening, as you need to judge what exact time to use what skills, you cannot escape from long distance attacks of the BOSS due to pollen explosion, maybe you survived this time, then what about next attack?