Okay so this deck runs multiple ways and is very thorough and thought out. I might be somewhat new to the tcg but I know what I'm doing :D.
So.....
The main way I wanted to run this deck was around either Seismitoad Ex, the Klinklang protecting steal from Ex or Aegislash and keldeo Ex for some crazy unavoidable untouchable damage.
Since most decks are heavily Ex in my area it works gorgeously, but even without working around Klinklang it does wonders. It has great synergy and is gorgeous against even fire or a pyroar deck. I say tank/ control because in between not taking damage from ex to my steel, I also have skarmory ex which discards a tool from the pokemon it attacks, cobalion ex discards a special energy and then finally Seismitoad Ex with his first ability locking out items. These all help stall my opponents whilst I draw into what I need. From the trainers I'll go into depth later on what I have planned for every one of them. But for now let's just say my Skyla is my ace up my sleeve for trainers and Keldeo Ex is for my pokemon ;)
That being said.
Way 1. Working around Seismitoad Ex there's two ways I can run a setup with him.
A: run him with metal and water maybe even Klinklang on bench, if so I would put a mountain ring up for protection of my bench of his Grenade Punch at 130 damage + possibly 20 from a muscle band, and the effect of 30 damage to 2 of my bench Pokemon is negates orrrrr
B. I can run with Seismitoad Ex as my active and have Kyurems on my bench.... The kyurems have outrage, so in them taking 2 or 3 hits of that back splash damage from seismitoad Ex they're outrage gets built up and with a muscle band has a chance of doing, say after 3 hits of seismitoads Grenade Punch effect, about 130 damage.
Now before I go anymore in depth I would like to say Keldeo Ex works for every situation I have setup! All I need is a float stone on him, I rush in pull him out with no retreat and I can put whoever I want in. Not only does it maximize damage for the fact I don't have to spend a retreat cost. But also does something amazing for aegislash, I'll explain that now, for Aegislash he has either mighty shield or buster swing. The amazing partS of this are not only his stance change of switching to a different attack at anytime before an attack if I have the card... But the mighty shield ability WITH Keldeo ex rushing in with a float stone.
Now with that being said if I use the mighty shield it states I prevent all damage done to the pokemon next turn, but I cannot do it again next turn... With keldeo's rush in with a float stone for retreat, it negates the fact I can't use the attack again! So I can just rinse and repeat and with 50 possibly 70 with a muscle band. Then 120 with no resistances included with possibly 140 with a muscle band. You think it's too op? Well it kinda is and having Klinklang on the bench makes it just that more bad @ss haha. Theres only one counter to it! Lysandre out someone else and think from there lol. But still it's pretty sweet.
Two more tactical advantages can be used from the Klinklang to buffing up my metal pokes! The cobalion in my decks first ability does damage times the number of energies attached to the opponents active (20x)! Watch out mewtwo ex, yveltal ex and fairy decks lol! Not only that but his second attack does 80 possibly 100 with a muscle band and it negates the opponents active from attacking.... Plus klinklang? Ex are screwed completely haha let alone whatever gets thrown at me.
Last one is one of my personal favorites is Kyurem and Skarmory Ex!!!! They're best friends foreverrrrr <3 lmao. So kyurem has glaciate as his second attack which does 30 damage each and every single one of your opponents pokemon bench or active what have you! If you look at Skarmories second ability it's called Tailspin Piledriver! It does 80 damage plus 40 if the active pokemon has ANY damage counters on it!!!! Plus a muscle band?!?! That's 140 damage because every pokemon has counters on them :) I realy heavily on this and aegislash keldeo if there are barely any ex. So in that instance I put in 2 Skarmory ex and pull out a Cobalion!
On a side note Cobalion Ex is extremely versatile because his first ability discards special energies and second for the sheer fact it ignores resistances AND ALL EFFECTS (that means abilities!) watch out pyroar! Get one shotted with 120 from having a muscle band. And sigilyph!!!
Now to delve into the trainer and item cards!
First I wanna talk about Shauna!
Sure I love junipers and sycamores but I found myself screwing myself over too much because of the number of trainer cards I have. Shuffling what I have in is perfect because I need everything I can get
Now float stones as I stated before there used for keldeo ex. But lastly when I go against a fire deck if keldeo ex is not on my bench with a float stone I put it on Klinklang because he's sure to get lysandre'd out!
Next is skyla. There might be one but boy does she do wonders considering how the way I get to my pokes and my tactics I've shown above she is my trump card when it comes to those nail biting moments. Like setting up Klink to Klinklang with a rare candy, or Honedge to aegislash with a rare candy.
Like I said before mountain rings sole purpose is for seismitoad ex AND countering other peoples stadiums. My biggest fear is a poison deck with virbanks cause regardless if they hit me or not 30 damage between turns is still pretty nuts lol
Heavy balls are much needed even tho they are going out soon to get out my Seismitoad Ex, aegislash and Klinklang in a pinch
Professors letters for the obvious energies
Pokefan club for my basics and ex alike. Or starts offs to my two main metal guys
Lysandre for winning kills whenever I need
Superior energy retrievals when it's too late BECAUSE I last the game for sooooooo long you have no clue. I have won a handful of matches from waiting out someone's deck to run dry of cards!
And the muscle bands to make my team that much more ferocious!