Super Geezer vs Grease Lightning
Ikaris is tough. He's been around for perhaps thousands of years. A veteran with skill. But take these things into account:
We're not a on bus
Zoom isn't some broken down black dude
So Ikaris' old veteran bum skills won't necessarily come in handy here. First i want to see how the old geezer deals with someone whose reaction time is fast enough to block his physical attacks without much effort. Here is Zoom countering Flash's attacks with one hand.
I don't doubt Ikaris' durability, but for how long can he handle a punch packing enough mass to feel like one from Superman?
Regarding Ikaris' teleporting
Ikaris can teleport himself psionically, but prefers not to do so, since, like other Eternals, he finds the self-teleportation process physically unpleasant. He can also teleport other people along with himself.
He's be risking putting himself in a position that leaves him in a vulnerable state against an opponent that is too fast for him to have time to recover.