A1: Its best to leave these 2 till last.i use heat scope clear out the front of mansion and those to the left.then up hill side of the mansion where the cars are.then gather laptop kill those patrols and ones if any down the hill.
then position bravo outside to the left of the mansion where broken walls are.that stops pius getting away.then enter the building via cellar and kitchen,you can change weapon now.collect the intel and kill terrorists downstairs and work your way up.once the cutscene starts the boss goes to his room send your mate in to clear then go outside thru the door pius is to your left over the wall use flashbang on him.once he surrenders go get your final intel in boss room and arrest him then arrest pius go to extraction..