i'm not a huge fan of olimar's tether recovery, when i play, and i haven't spent a lot of time playing the best of the best, i try to never be completely dependent on the tether to recover. for instance, depending on who i am playing against i might actually try to recover over them using air dodge or up b. not that's something i don't think would be too effective against certain air dominant characters (i.e. metaknight), and it probably wouldn't be too effective against any smart opponents. If i am coming in low, i'll try to save my second jump, if i haven't already lost it, to try to sweet spot the ledge or to place me close enough to resort to the tether. if i'm getting edge hogged, i can use that second jump to jump, or the little jump from up b, to get over the hogger and get on the platform.