STP for Tizona, usually DA for everything else. I made a DA cape (currently doubles as my ws cape for noncrits), haven't done an STP cape yet. Will get around to it eventually. Next month's cape will be STR/WSD.
Some thoughts after considering CDC's real fTP:
CDC spam is likely still the best option, or very near it, in most situations if multi-step SCs aren't an option (soloing, low mob HP, etc). Savage Blade and Expiacion can rival it for per-WS damage given the right weapons/situations and if you're holding TP that's another factor to bear in mind, but the incidental skillchain damage is a potential bonus and the increased TP return is sometimes of interest. If you
can perform extended SCs and the target takes reasonable SC damage, it's probably in your best interests to exploit that. I see a few notable options here:
(Req>)Savage>CDC/Expi>Req(>Req) is a solid multistep dark that Sequence can extend into umbra. Sequence can also do Req>CDC>Req for two darkness skillchains in a row, with the second getting a boosted multiplier. The heavy use of Req kind of sucks, but the skillchain frequency/damage is pretty nice and there's more opportunities for magic bursts if you're in a mixed party.
But what of a good multistep light, so that we can close a double light or radiance with CDC... lack of a practical fusion weaponskill is a huge limiting factor here. CA's cooldown, TP consumption, and the extra second of forced delay severely curtail the viability of Thrashing Assault, to say nothing of spell damage's limited potential. Our only other fusion weaponskill is Realmrazer, which is also impractical in a multistep sequence. That means we'd have to step down to t1 skillchain properties.
Red Lotus Blade>
Vorpal Blade Circle Blade/Flat Blade (fusion)>Savage Blade (light)>CDC (double light) works, and Sequence can insert Requiescat (scission, makes liquefaction with RLB) at the start of that skillchain for aftermath and thus radiance, along with boosting every SC along the way. Savage Blade, Expiacion, and Vorpal Blade also possess the scission property, so non-aeonics have a few options for 5-step light openers if so desired. Sadly, the need to employ two low damage weaponskills really hampers the skillchain's viability. You could do it after a 3k Expiacion for mythic AM3, but that's infrequent enough that I'd probably do Expiacion>CA Thrashing Assault>Savage Blade>CDC instead whenever possible. Speaking of which, have fun trying to juggle all this with buffs, debuffs, and potentially aftermath timers.
You're can't always fit both Requiescat and a closing CDC into a decent skillchain with another DD. Liquefaction weaponskills are generally terrible; pretty sure the best ones are Stringing Pummel and Asuran Fists. That means you're probably sticking to t2 properties, and it's four/six steps from Requiescat to double light. The only way that's going to work well is if they can reliably cram in both a fragmentation and fusion WS before you get too far past 1k, in which case you should probably do fusion>Req>frag>fusion (light)>CDC (light/radiance). Can also do frag>CDC/Expi>fusion>frag (light)>CDC (light) if you don't need Req or can start with it for a 6-step. Darkness and umbra are much easier (though you'll need to adjust for which of the two you're doing), with several different possible skillchain paths. Worth bearing in mind when you're considering which weapon to mainhand for a given fight and setup since it places some limitations on your ability to fully utilize Sequence. If you're not getting the closing WS or can't utilize Requiescat at all, Tizona or Almace may be better choices. You'll also need to consider how often you're utilizing Expiacion and especially Savage Blade since they both scale strongly with TP.
Obviously all this goes out the window if you're not the one closing the skillchain, use your best judgment. Too many possibilities to reasonably cover here, and this post is already getting pretty long.
Really is a shame that Sequence's TP bonus doesn't work in the offhand, but Tizona/Sequence still has an edge in TP gain so maybe that's an option to consider now depending on what weaponskills you're using at the time.
Lots of different options to bear in mind, we'll see how they each pan out. Planning to work on radiance/umbra skillchain multipliers once I'm done with 2k/3k Expiacion testing.