If your Sticky Bomb is stuck on Seris and she uses Shadow Travel, the Sticky Bomb stuck on her will still be visible. You can track her down that way, but you won't be able to attack, unless you decide to detonate your "tracking device".
Your shadow travel can make you immune to everything. Use it to cancel ultimates and abilities, or use it in sticky situations. (I recommend using veil since it can make you go into shadow travel faster.)
Ruckus with Wrecker can literally melt your shield! Formidable might be a good alternative to Aegis, since it gives you healing when your shield is abscent, but only once every 40 seconds, so enter the fight at the right time!