(Bloomberg) -- Credit Suisse’s go-to banker for Russian billionaires has been retained by UBS Group AG, in one of the highest-profile moves yet for the merged bank’s wealth management business. Babak Dastmaltschi is working at a new unit in UBS’s wealth division that regroups an elite crop of senior private bankers from both UBS and Credit Suisse who handle some of the most important client relationships, according to people familiar with the matter who didn’t want to be named discussing personnel decisions. The unit, called GWM Strategic Clients, is run by Benjamin Cavalli, another Cr...