Well, looking back at your posts, it seems like you booked only a few days ago, so you are still eligible to get a pre-existing condition waiver if it's offered. Several independent insurance policies will cover that. I still don't know if the
ABD one will; I've gotten conflicting information in the past. If that's a concern for you, I'd suggest you call ABD & find out if they offer the waiver or not. If they don't, and you want the waiver, you'd need to buy independently.
If it's not a concern for you, then another consideration is what do you want to cover? If it's just the loss of the cost of the ABD if you cancel beyond the cancellation period, or medical coverage while you're on the ABD, then ABD's policy, although a bit over-priced, will be fine.
If you want to cover any costs in case you have to change your flights, or any medical expenses before you arrive in Ireland for the first day of your ABD, then the ABD policy will not cover that. They won't cover if your luggage is lost or delayed by the airline. (I'm assuming since you're using points that you're booking that yourself). If you get stuck in an airport or somewhere overnight either coming or going home, they won't cover the cost of a hotel room.
Again, it depends on what you want covered, and what you're willing to take a chance on.
Sayhello