The dread saurian is a tricky unit to balance, I admit. That being said, after some basic testing I feel that it is too much of a monster killer rather than an anti-infantry beast. It is one of those monsters (e.g., mammoths, giants, etc.) that really should be more specialized vs. infantry imo. I say this because of the type of monster that it is (e.g., its physiology, animations, etc.).
The reason why I say that it is a monster killer is because it has a ridiculously high WS (which is good vs. large targets naturally) but its anti-infantry capabilities are limited by its splash attack target max (SATM). That much WS seems like overkill for infantry and it does seem like the dread saurian one shots a lot of infantry with each attack because of the high WS. I think it might be more appropriate to have it hit more targets and have that damage spread out more. It just seems more realistic seeing as this is a massive monster that really should be damaging more combatants with each attack.
Even if you (Duck) do not want to risk doing this and possibly making the dread saurian too powerful, you could always have an increase in SATM accompanied by a commensurate decrease in WS to compensate a bit. Alternatively or additively, you could decrease its MA and give it a bonus vs. infantry (BvI). Just adding a BvI would help make it more of a niche anti-infantry monster like the mammoth.
Next, I've noticed the dread saurian's attack interval is very short. I would suggest increasing it a little bit.
The last thing is.... collision damage. Seeing as this is the most expensive monster in the game and seeing as it is incredibly massive, I think collision damage is indicated. Moreover, it would make the dread saurian unique since it would be the only LM monster that has a significant amount of collision damage. And I seriously doubt cycle charging would be an issue since it is fairly slow and its charge does not appear to be that powerful (although collision damage would help with that I assume).
To sum up: I suggest adding some modest amount of collision damage, decreasing WS, decreasing MA, adding a BvI, increasing the attack interval, and increasing SATM. If you disagree with every single one of these suggestions, please at least consider decreasing both dread saurian unit's cost. In particular, the howdah variant is perhaps a little overpriced at the moment.
P.S. - I haven't really noticed much of a charge animation on the dread saurian. Instead of increasing its speed and charging ahead, it kind of just continues to lumber forward and then attacks normally. Seems anti-climactic lol. If you could pass this along to your animators I would appreciate it. In the in-engine cinematic, the dread saurian charges forward running after the war wagon. THAT is what it should look like when it is charging imo.
Thanks for your time.@CA_Duck