My experiences with bats (earned with my wallet
My son is a 13 year old select player. Has used TPX bats since his 10 year old season. He switched to the Omaha bat because he liked the "feel" and has had luck with its durability. We sent alot of Eastons back dented. Granted these were -11.5s.
He started using a -3 and wood in the off-season when he was 12 with the plan to use a -5 in games. By the time games started that year he stayed with the -3 and has had no problem since. My impression is that durability is a much smaller issue with the -3 drop, however, he feels that a new Omaha needs a substantial amount of BP before it gets "broken in". (This seems to be the time when denting is most likely to happen.) Once it is "broken in" they don't seem to get dented. He will then get about a half season of good "pop" out of the bat before it goes "soft". He has played 85 to 100 games per year since he was 9. He generally hits 1,2,3, or 5 in the order depending on the pitching and/or defence of the opponent.
Generally, he breaks a new bat in by first using it for tee and soft-toss. He will hit 100 to 250 soft-toss balls 4 or 5 nights a week in December and January (homework and grades dependant). He will then start using that bat (last year a 30/27) for bp and start using a new (last year 31/28) bat for tee and soft-toss so it is ready when he needs a bigger bat.
Maybe a little ****-retentive but it seems to have worked for him.
Swing hard - just in case you hit it!