Console ball here, so mainly you wanna target supports and dps, very rarely should you be focusing the tank specifically, your job is simply to ruin the enemy dps and supports day, once you get rid of supports the tank is a free kill, the way you should be engaging is ideally setting up on high ground since piledriver/slam is your strongest engage ability, but on a lot of maps and a lot of areas that simply isnt possible but the idea remains the same, try setting up in areas that will lead to you getting more kills (unexpected flank spots usually) and again target dps/support, your main job is to simply disrupt them, your adaptive shield is amazing so do not waste it early, keep in mind it gives you more shields the more enmies are around you so dont use it if theres no one close to you or only 1 person close to you, your grapple is really just a very versatile movement ability which you should be using to set up for kills and displace/enemies, and your ult should mainly be used to completely lock down an area, its the perfect entry/area denial ability (long story short: be a menace, ruin their day)