Dioraja is actually not all that good compared to Rajakylo. It gives up Long Defense and Extended Critical Strike for Short Defense and Distracting Impact. Tank busters and immune dinosaurs would do well, although it is worth noting that unlike Rajakylo, Dioraja is faster than Indominus. Tryostronix is probably the best counter that comes to mind, along with Indoraptor or Monomimus.
Indoraptor is a coin flip. The only thing that will beat it at the same level 100% of the time that I can think of is Tanycolagreus. Stegodeus and Stegoceratops are ok because they can tank its damage and slow/stun it through its cloak. Monomimus might be able to win here as well but I haven’t got a good grasp of whether it does enough damage unless Cleansing Impact was already used.
Trykosaurus I haven’t faced too often but it can be beaten similar to Dioraja. Tryko is all damage so damage reduction works well, as does Defense Shattering if you can predict the Invincibility. Again, Tryostronix comes to mind, as Ready to Crush wouldn’t require you to take a hit from the counterattack.
Diloracheirus I haven’t played against, but it’s got an identical kit to the Dilorano, giving up health for damage and speed. Anything with armor/shields should do well. Stegodeus opening with Superiority Strike to cleanse the Distracting Impact into Armor Piercing Rampage should probably kill this, considering most Stegods are around 25 and this should be around 21 or 22.