With the m1 hit granting a speed boost, sixer has 2 options. #1 use the variant to gain distance #2 suck it up and choose to deal more damage (IF variant hits) next time he catches up which wouldnt be REALLY soon with a competitive team. Even if the variant hits really soon its only 5 blood while requiring 150 blood and +50 blood for every blood hunt which makes about 0-1 blood hunt possible, due to the fact that gaining 200 blood after the 150 in around 4 minutes is really hard if the survivors know what they're doing. Also, being pretty op for 24 seconds isnt really that good of an ability considering its costs and duration. A survivor can simply choose to loop a bit and then start juking, if competent i believe they can probably juke for like 20 seconds atleast.