Honestly it's High Hp Trial, need one tough creature to play.
(Normal Trial needs 2100 Hp, then how much HP does Expert Trial need?)
Both Nundasuchus and Irritator Gen 2 own Immune to Deceleration, so make sure you have enough Hp to tank damages, or go faster, like Entelochops with it's MF.
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https://www.youtube.com/watch?v=NF4fnMg1P7I
I want to use some creature like ML, but Lv15 can't survive under 2 attacks so the plan had abandoned, too risky to bring much low Hp creatures.
Try to pass this stage asap, or you will be hit by multiple attacks from AI.
Tips:
3x R-Class creatures with Counter ability
** Before every attack you choose, you need to notice that if the attack can't kick opponent in current turn, then you will receive at least 2.4k damage from AI
* Sometimes C-Class moves can reduce counter attack and specific moves
Recommend:
Immunity (Deceleration), Fast
/
F-Class (Heavy Attack, Rend)
DoT (if possible)
Distraction (if needed)
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https://www.youtube.com/watch?v=njdGeK1DLkQ
What if you don't have Lv20 member?
Seems everything fine, no crit means you can done this with same way... Or try to use Crit Buff and FA as Teryx's main attacks, if Crit landed, catch-up as my first video.
Well... that's lowest requirements as I know.
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https://www.youtube.com/watch?v=EF1lFj-NLG4