So I've been breeding Thylacoleos like crazy to get mutations and I ended up with a bunch of higher level ones I didnt need so I decided to pit them against a level 1 Titanosaur (all the Thylacoleos where between 120-130)
A 100% imprinted giga hatch at 340 melee but loses almost 10k health and thats with an ascendant saddle. You would need like 80 thylas all imprinted with asc saddles just to maybe take one down.