I think we go one champ upgrade only at a time for as long as possible.
I personally see Vogoth as, at best, a stopgap in CB.
I think better to build the champ that decreases speed requirements for all the other champs, enabling us to bring in more defense, accuracy while hitting proper 4:3 or 2:1 speeds. More debuffs, more sustain. More turns, way more damage.
For long term survival, much more important than another source of healing after the hit, hoping we don't die from the hit, is that we are properly speed tuned to have our Dec Atk up while the Inc Def up, with a leech for our sustain (and you can get this leech from Hotatsu and Deacon both).
Basically Deacon speeds the whole team up, enabling us to both build better or even into 2:1, he brings a backup leech, he brings Dec Def, enabling us to 1:1 swap him for Uugo.
As far as epic books, Hotatsu has to be the focus, then whatever Ally Protection we settle on. So there's honestly an argument to build Hotatsu and just plug and swap already built around him until you've found your best temporary team to sneak into Nightmare and get yourself some books.
Vogoth is still in my 1key NM team on alt :) still haven't finished that new comp... ugh
I readily admit that I am just theory crafting as I am far removed from these early game quandries. Better to send these n00bs to others in case the comp doesn't work :). My vogoth team though is 1) not speed tuned 2) only uses 2 real cb champs 3) has no poison and no pure dps (geo makes this moot i concede)
Sepulcher is a throwaway champ imo though, only thing I don't like about your suggested comp. Granted sometimes we have to build those...