I literally loled. What's the problem with using two energy to attack for the initial Kingdra? In the deck where you never attach an energy until you need to, it will NEVER make a difference. Furthermore, Call energy is essential to set-up on early turns. Without call energy, how do you guarantee early basics? Speed is what Kingdra is about, it's what makes the deck good. Cutting the speed of a speed-reliant deck in nearly half for a OHKO later on is absurd.
Because thats what roseannes are for. You arent going to be needing energy so why get energy with roseannes when you can get basics.
It lowers the chances of the laready somewhat slim although very possible T1KO because your stuck with a call and not a water.
It makes your max damage out put about 90 instead of about 120-140 with aqua pump. Aqua pump is very essential to the deck, call energy takes away from aqua pumps potential. Kingdra is fast and can have a potent late game OHKOing almost anything in the format with aqua pump. calls slow that down.
Its not like your running a bunch of lines in the deck so 1-2 roseannes are fine. you have claydol kingdra and usualy about 1 or so tech. roseannes fetches those basics quite well with out call.