I get along well with Veil on level 2, because you have to anticipate when to go into shadow travel (Seris has many other important cards to pour points into, like Fade to Black, Dark Whisper, Blood Pact, Soul Forge 5, so I try to have Veil as low as possible). For example: you spot an enemy flank that is about to dive you, and you go into shadow travel. Even with full health. Seris can't 1v1 a flank. And just hope that your team helps you. Or you can go Dark Whisper lvl 4/5 and Fade to Black lvl 2/3 and just run away from them. Unfortunately though Nimble doesn't stack with Dark Whisper.