If you're like most of the others here, you're going to be doing ELT with a strategy that involves OTKOing the parent bombs. This is super safe and easy, but it will limit your scans to only hitting the Mom, Dad, Fire Jr, and Thunder Jr. If you're like me and want the other 6 of them, here's an mini-guide with tips and explanations.

First off, your party. You're going to be doing this on ADV, obviously, which means things are far easier, but you still run the risk of death if you don't take at least basic precations. And equally, it's going to be super slow if you don't bring abilities to deal all 8 elements at once. Therefore, I suggest something like this:

Magic tank (Mystea/Shylt/Basch/ARain/etc): Gear up for 130% all resist to make things a joke, but it's unnecessary. The higher the better. At 130%, you don't need to care about imperils, but even without it, you'll take so little damage it won't matter anyways. You can support this with buffs if you have them for even lower gear requirements. Easy stuff.

Healer/dispeller: Someone with dispelga to cast every turn makes the physical smacks from the parents sting a bit less. Not really necessary, but I just preferred safety. Also was the one dualcasting Libras when needed for me while others did stuff.

Stat buffer: Your offense won't really matter, so really whoever can spit out the highest DEF/SPR/mitigation and optionally resists if your gear is lower. Carbuncle gives free -aga barspells for three elements, two of which are the most important ones.

Damage dealers: Okay, here's the easiest way I worked it out. You DON'T want killers or high attack. I had only ~800 ATK on one of my units and still was hitting the bosses for 40-50% HP when I did attack them. Their roles will be to kill the mini bombs, and do no more than 50% damage to the bosses. You also don't want units with counters.

Now, here's the question. Covering 8 elements with 3 DPS. For starters, you can (and should) DW two elemental weapons on at least two of your DPS. The other ones can come from abilities. I find taking a friend OK or Kunshira (who I took) is great as they have 4-6 elements available.

You'll probably want to set up your elements as something like so:

• Kunshira: Can naturally deal light, fire, water, wind, lightning
• DPS 1: DW an earth and fire element weapon
• DPS 2: DW an ice and dark element weapon

Or, if OK is more your thing:

• OK: Can naturally deal fire, water, wind, and earth, equip holy weapon
• DPS 1: DW a lightning and fire element weapon
• DPS 2: DW an ice and dark element weapon

This allows you to deal with all elements of baby bombs and also helps reduce your damage against the parents (as the elements are split). DPS 1 will push dad and DPS 2 will push mom.

Now, the mechanics. You know, those things you managed to completely ignore while building that OTKO from 80% or so in ELT. Here's the gist of things that matter:

• Each Bomb Jr element will be summoned up to 3 times each max
• Mom bomb will summon fire and lightning from the start
• Mom bomb will start summoning wind and light under 50%
• Dad bomb will start summoning dark and earth under 50%
• Dad bomb will start summoning ice and water after mom dies

That last one had me at a loss until I looked it up. Thanks, wiki discussion page! I wasn't sure what I needed to do to get them to finally show up and was sitting there with both mom and dad at like 20% doing nothing on summon. So basically, the simplest easiest steps are:

1. Keep defensive buffs and magic aoe cover up
2. Libra mom and dad if not done already
3. Optional: Dispel bosses each turn for less damage
4. Libra and kill fire and lightning juniors
5. Push mom under 50% with DPS 2
6. Libra and kill wind and light juniors
7. Push dad under 50% with DPS 1
8. Libra and kill earth and dark juniors
9. Kill mom bomb with DPS 2
10. Libra and kill ice and water juniors
11. Kill dad bomb with DPS 1

In general, you should take no magic damage at all, and the physical is reduced to the hundreds of damage per hit. The occasional cures will keep everyone just fine along the way. The main difficulty is making sure not to oneshot the mom and dad (or kill them with counters like I almost did).

You may be able to combine steps 5/7 and 6/8. I didn't push both of them at once, but it's theoretically possible that they might both summon at once. You may also be able to just immediately push once you libra the first of each without killing three, but I think I read it makes later summons random from all in the pool where if you kill three it guarantees the right types.

Hope this helps you other libra completionists here. Amusingly, getting all the libra entries for this fight took longer than the actual fight itself. So sad we bypass so much of the fight mechanics with the OTKO strat.