Patch Available - KMST 1.2.408

Because without the defense, Paladins are just gimped Heroes.

If you realize this, then I don't see why we're even having this discussion.

For a second, you should stop living in goldbuyer land where everybody has, at a minimum average, of +150% STR.

I actually live out of that county, and my 6% STR shield + 1H Weapon quite exceeds what I could accomplish with a 2H Weapon.
But keep on insisting that absurd amounts of %-STR are required. It's never happened before, but maybe you'll be the first person to say something so many times that it actually becomes true.

Enjoy soloing pink bean or chaos horntail or empress, what, with their resistance to all elements.

Chaos Horntail doesn't resist all elements.
As for the ones you listed that actually do, I believe you're pointing to a problem that has nothing to do with a Paladin's equipment options.
That's an issue entirely created by Nexon's own stupidity.