Well, if all those, ‘no matter what’ explicatives are sincere it looks like there’s just no talking to ya! Tungsten is a lot more brittle than steel and lacks the service life. The ridiculously small amount of weight a tungsten rod adds to the front of the pistol isn’t going to reduce anything - Nothing! You’d be much better off simply learning how to improve your grip on the pistol.
You want to use an 11# spring in either a 9mm or a 40 caliber Glock pistol! What, the heck, for? What generation is your Glock 23? If it’s anything, but 4th generation, you’re going to need a Wolff steel guide rod to go along with - no less than - a 15# spring; and, if your Glock is anything, but 4th generation, you should also be able to fire cheap, ‘range quality’ Wal-Mart ammo without a recoil spring change. There’s really no particular benefit to anything you’ve said. Me thinks you need to learn a lot more about Glock pistols BEFORE you spend anymore money, ‘dressing up’ that G-23 you’ve got.
