Epsilon Ace pilot ability makes it a 12 as long as it is undamaged. For 24 total points you can give it a shield upgrade and comm relay to help it stay undamaged longer. Aside from when it takes damage the only things touching pilot skill 12 are either a rebel list with Roark Garnet which could tie it, or a scum list with Torkil who can make it a zero. So for 24 points or less is it worth putting Epsilon Ace in a list to try and hurt VI Whisper, Vader, Soontir and all the rest, or at the very least force someone to waste time firing on it instead of other targets, or not worth an include at all?

No EPT and a measly 2 attack dice means he is not much of a threat. Especially against high PS aces that have an evade token.

The best use for Epsilon Ace is TL babysitter for Vessery. With a comm relay, he's only 20 points, so it leaves you lots of options for a well-rounded list and Vessery will almost certainly always have a TL-painted target to enable his ability.

So for 24 points or less is it worth putting Epsilon Ace in a list to try and hurt VI Whisper, Vader, Soontir and all the rest, or at the very least force someone to waste time firing on it instead of other targets, or not worth an include at all?

That is the question you have to answer. If the other 76 points in your list, you believe can take on the majority of other lists (like Triple Jumps) and come out on top, or if you're exceptionally weak to aces, maybe it would be worth it. It depends on the rest of the list really.

Epsilon Ace pilot ability makes it a 12 as long as it is undamaged. For 24 total points you can give it a shield upgrade and comm relay to help it stay undamaged longer. Aside from when it takes damage the only things touching pilot skill 12 are either a rebel list with Roark Garnet which could tie it, or a scum list with Torkil who can make it a zero. So for 24 points or less is it worth putting Epsilon Ace in a list to try and hurt VI Whisper, Vader, Soontir and all the rest, or at the very least force someone to waste time firing on it instead of other targets, or not worth an include at all?

Can he do it sure... Can he do it effectively? Probably not, he has to have so much go right for it to be effective your going to bang your head against the table more often then not. Good as a support for your other ace but he himself not sufficient enough.

Seems decent for hunting TIE phantoms, but that's about it. And with "Whisper" running Agent Kallus, it gives your opponent pause as to who to declare that Agent Kallus on because you're shooting before she can cloak again. I agree with others that he's not much of an Ace hunter. If he could take Crack Shot, we would be in business!

Sorry to be boring, but I'd say you're better off shelling out the 2pts for Omega Leader. He's an incredible ace-killer when flown properly. As others have pointed out, Epsilon Ace will have issues hitting turtled aces with his 2 attack dice.

Zeta Ace with VI and initiative bid could maybe work? but again you have the same problem of him being inferior to OL as an ace killer.