Tager is my most feared and hated match-up, but an easy one provided you know what to do. When the match first starts, quickly air backdash and get a few charges prepared. I'll say it now, charging Tager "gung-ho" style will get you killed horribly. It's best to either wait for two things. A.) Tager gets impatient and start jump attacking an effort to get close to you, or B.) Tager goes to charging his magnetism gauge. The response to A would be to timely attack him with your anti-air (2C-2C) when he's in mid-air, then punish with a BnB of your choice. For scenario B, now would be a great time to rush him while he's vulnerable charging. After you're done punishing, rinse and repeat the strategy. If he starts trying to close the distance with "Sledge Hammer", punish this with [4]6D > 236D (land projectile then D version of Sanctus Aequum). One last thing, try NOT to get magnetised. If you're in a situation where he picks you up with Gadget Finger, I advise you, NEVER attack on wake up. He'll whiff it everytime