You seriously need to check your grammar
. Besides, you must gain units while you are doing this harassing, microing them and protecting your base when it gets attacked will help you tech successfully. Most noobs who tech don't bother getting units and look what happens, once they get found out... its game over.
And you will just be feeding destroyers mana if you get too much bloodlust, also spell breakers can steal it and give it to a unit. Also, the buff can be dispelled. So don't rely too heavily on one kind of spell.
Also, I don't like your hh wyvern strat. 1) You need some real units in front of piercing and 2) If your melee is distracted from something else, what is gonna save your men from fiends or aa?