W/Me. Healsig, Sunspear/Res Sig, and a couple of Mesmer signets for some specific utility to deal with a particular situation.
It's not exactly a cookie-cutter build, but it's not obviously a bad idea in every possible situation either. I wouldn't do it specifically to power Symbolic Strike, but if for some reason you're carrying the signets anyway, you might as well carry the skill that becomes a non-elite Quivering Blade without the downside to go alongside them.
Enraged Smash does have the advantage of being able to be used twice as often - coupled, of course, with the downside that it takes up the elite slot. However, my point is that there are a number of skills that might be advantageous to have fully charged on your bar without necessarily wanting to use them immediately. Flail... when your last usage is still running. Lion's Comfort... when you don't need the heal just yet. Dwarven Headbutt... that you're keeping in reserve for when you need a hard interrupt. Whirlwind Attack... but you only have one target to hit right now.
You shouldn't be carrying these skills specifically to fuel Enraging Smash - you carry them because they provide utility that you might need, and Enraging means you can have that utility while still being able to dish out a decent amount of damage - instead of just filling those slots with a whole lot of other damaging attack skills.
But yes, as I've said, I think Dragon Slash wins. But you don't necessarily have to use
[skill]"For Great Justice!"[/skill][skill]Enraging Charge[/skill]

[skill]Steelfang Slash[/skill][skill]Dragon Slash[/skill][skill]Flail[/skill]
(or your variant or alternate cookie-cutter build of choice)
every time you wander out of the town gates. Sometimes, a non-cookie-cutter may even serve you better (however rarely).