I'm assuming FTK= means first turn kill...
I'm confused, there isn't a first turn kill potential with a 40 HP, fighting weak elekid? Did I miss something here? Riolu would OHKO both of these on a heads, Machop would 2 turn KO both of them. Plus if elekid/buzz get KO'ed, you just lost some of your options to building up to a 'vire, which hurts. Or even you build up to a 'vire with the elekid you started with, he will already be damaged. I know that's a weak argument (because your opponent's guy is getting damaged at the same time), but putting a new, undamaged one out after the castform is KO'ed at least gives you the potential for being able to use him for more turns.
I like castform for his energy attach power too:
- his energy attach power gives you more options for powering up Flygon δ/Flygon ex δ. (you don't usually want to attack with Flygon δ, but sometimes you get backed into a corner...)
-if you use him to attach to a 'vire, you discard HIM instead of energy, which is so KEY. 'Vire's attack causes you late game energy trouble, but using castform helps solve that a bit! You basicly discard 1 energy attach instead of 2, which leaves you with more resources after your attack, and this helps you pull off 'vires attacks more consistently.
-of course I love the ol' switch castform for the lightning energy attached to 'vire, then use flygon's power to put the same energy right back on to 'vire. This really helps if you didn't draw an energy during your turn, plus it just feels cool.
-mentorable energy! helps bail you out of so many situations it's not even funny.
I hate to disagree with you, Bull, since your articles/advice really got me pointed in the right direction as I was just ramping up to get into this game, so I feel like I am disagreeing with my dad or something... but well...there you have it. You may still be right, I'll have to think about it more, but castform is just so good in so many ways. Drawing 5-6 cards per turn (before castform gets knocked out) between him and the buzz's just feels so good.
Wow... sorry for the long post. :-D