The ideal sequence is:

I Legion's Landing (1 mana/1 creature)

II Servo Exhibition (2 mana/3 creatures)

III Growing Rites, attack with 3 creatures, transform Legion's Landing, play Sacred Cat, transform Growing Rites (8 mana/4 creatures)

IV Start slamming Carnage Tyrants

Of course, a single removal spell or a block on turn 3 (which is certain 95% of the time) slows us down significantly. But I think we can still reliably have 6+ mana on turn 4 or 5 thanks to other ramp.

Four of each Legendary Enchantments take up a lot of space, but I want to have access to the basic plan as often as possible. Both have ETB abilities, so we can just repeatably cast them and sac the other.

There are cards that care about the number of creatures, that's why we have Servo Exhibition and Oviya. I'd like to add other cards, like Aetherwind Basker; however, I don't think it really does anything, it doesn't have energy support and is not an upgrade from Carnage T and WS Avatar.

Sideboard will be maybe filled out later; probably just generic cards to strengthen this or that matchup.