Making entirely new class features is extremely difficult though. I mean, the Dual Strike ability isn't exactly original, and actually a well known Epic Feat. There's nothing wrong with taking inspiration and ideas from other classes, and some class features (Uncanny Dodge, Evasion, Mettle...) are simply universal.

Plus, you need to be able to balance the fluff and the crunch. Like, True Counter... yeah, I can see where your coming from in terms of fluff, but in terms of crunch, it simply isn't that strong anymore. Especially when its equivalent, Counterspelling, can be done without any need to ready an action anymore (Epic Counterspell, though feat-heavy). So, maybe you could have that ability, and maybe something else as well? Oh, oh! How about the ability to use your Strike Maneuvers as Attack of Opportunities? After all, they are a counter-attack, right?

Also, you might wanna build on the 'the Striker is about lust, power and energy, you have to expend those to fuel his actions' thing for fluff and crunch... you should definently be able to ready more strikes and be able to recover them easier than usual... maybe you can expend strikes for bonus effects? Like the Abjuration Champion/Arcane Strike does?