Nyashira = Bashira =P 100 DC in the trading post currently.
Also, generally it's pretty rare to need 4 healers (IB is an exception of course, but I'd rather use a healer like CC'd Shiho as the 4th healer rather than have a backup 4th healer) and the 'drop hp tank to absorb damage' method seems better to me because the hp tanks are likely usable for other situations in normal times (such as CC'd bandits, valks, princesses)