I'm not a career DRK by any measure, but its definitely my current buildup project and something I'm really enjoying getting more familiar with its mechanics and strengths.
That being said, having the options of Caladbolg, Liberator, Anguta, and Redemption does produce some interesting situations.
I find Caladbolg to be the simplest to use. Build an AM-down set designed to get you AM-up asap- high MA, enough STP. Build an AM-up set around MA and crits. Build a Torcleaver set with enough Acc to fight that annoying weaponskill, and a metric *** of VIT and WSD. Go have a beer, your DRK is now functional.
Liberator feels the most natural to me as a non-lifer DRK, as a mythic AM3 really helps if you're not used to DRK's typical swing rate. Not to mention the AM3 set built around STP I found easier than other options. There's also more accuracy on the weapon itself Lib vs Calad. Not saying that can't be overcome, but its the starting point. WSs aren't as direct as Torcleaver in terms of gearing for them, but Ratri is so strong in many slots at least you dont' have to deal with Oseem!
Redemption at first looks like a hybrid of the two, but in reality that's very far from the truth. Yes, you have the ability to solo multi-step with a scythe that isn't nearly as effective on great sword, but you still have to design aftermath sets for it that contain enough MA to execute those 3 and 4 step chains. You do gain the lovely Empyrean Weapon aftermath which DRK can so effectively use for great spikes in white damage. Its my newest toy, so I'm still figuring it out, but I do like what its capable of in the right situation.
Anguta can do some interesting things with a 3 hit build (discussed by much better DRKs than me earlier, and a set on the 1st page of "high end sets" thread), and Cross Reaper can be a monster on pretty much all the scythes. I use this the least, but that's mostly because I need a slightly better foot augment to really pull it off competitively.
Only reason I don't own an Apoc is laziness. I have other jobs for soloing, so DRK is a job I only use in group situations. Apoc can certainly be valuable then, too, but like I said I'm not a lifer, so I'm ok not having that option in the toolbag for how I play the job. But major bravos to those who have built it and VERY effective ways to play with it.
tl;dr- scythe is really fun, and its in a better place than it was when you left. I think its a good idea to have scythe build options- but you needn't immediately build multiple RMEA scythes. Pick one to add to your Caladbolg that catches your play style, and go from there.