this build is useless from the very start, how is that still okay??

First, you don't have any defense so you will get melted by everyone that have a single aegis and atlas. second, you don't have enough co damage so even you manage to get close to the enemy team you won't do ****. Third, you don't build both cp and wp, because of you build both, you won't have enough damage for nether of them, so all you are doing is die and feed the enemy team. If you are new to this game, don't trust this build, it will only work for tier 3 players, if you want a real build, get sorrow blade, breaking point, bone saw, chargers, aegis and tyrants monocle.

Tap a taget, tap off the target, then tap back on the target, repeat. It eliminates the after attack animation so it speeds up your attack.

yes that is acurate. this is not a very reliable build

That is correct.