If history is to repeat itself, then i'd be more worried about getting through my first Line and Sim check rather than worry about where i'll be on any seniorty list.
As far as training goes, all new BMI entrants will follow the standard DEP short course; consisting of one weeks groundschool and four sim sessions, followed by an LPC/OPC. Line training will be a minimum of 14 sectors with line check included. In addition it has also been confirmed that all captains will be subject to a final command check. Historically during buyouts (think Dan Air/Citiflyer) this is where a number of people have struggled to make the grade.