
Blink is default but can absolutely go Beads if you think you need it.
Can trade combat blink for team beads if you want to blink->2 people and the AoE beads counters an enemy like Cerberus. Can also trade Parashu for Titan's if you want more % pen.
If tanks are fucking you up and you need extra % pen
If you like to precharge your 2 and blink, or if the enemy team has an AoE "beads or die" ult.