ok, AC 22, to hit +12 means feats spent on expertise and full plate proficiency. Str 18 and constitution 15, so this means that this fighter has only average battlefield control (+10 to it is easy to achieve and wis will make up for the difference) and it has an underwhelming will defense. and a fantastic -4 to endurance and athletics and acrobatic checks.
Grapple the fighter and attack him vs will defense and you will see him go down fast. (A daze attack which targets will should be a good option)
The fighter with 22 AC and +12 to hit is a monster against an even level enemy, but as encounters are designed, thats intentional.
PC´s are rather on the power level of elite monsters of their level or a monster of level +4. (depending on the kind of attacks or if its a brute or not, one performs better than the other)
so, what does it mean?
22 AC vs a single level 7 monster seems like a 50 - 50 encounter where the PC goes nova with dailies, encounter and utility powers and action point.
and on average we are looking at an attack bonus of +12 and AC 21 and about 100 hp and damage average of 10 for standard attacks.
And this monster doesn´t trigger fighters extra atacks because it focusses the fighter. I bet this will always be an encounter which depends on the dice, no matter which level 7 monster you chose. But chosing the right monster you will take the fighter down with ease.
edit: I don´t think there is anything wrong wih this build and i believe it is a viable route, if you like such over"optimized" characters. But optimization has its costs and its merits, and someone built for tanking and doing damage should not be punished. But I also don´t think it is a route i would take.
starting scores need to be at least 18,13,10,10,13,8 with goliath or warforged race and maybe this is the best distribution, and a very viable for the epic tier of a fighter, but later lacking some punch, because a lot of shield feats are unavailable and also heavy blade feats are unavailable too. Maybe you can put the 13 on dex instead of wis, or use 11,12 to get access to better feats, but then you have an even bigger hole in your defenses. And this is will.