If multiple creatures enter at the same time, evolve will trigger for each of them, and you'll perform each comparison separately
Fury of the Horde sees competitive metagame play in 1 format(s): Commander.
If you see her across the table, pack some life-gain hate, or youre in for a long night
If you can dig up a Spellskite to further protect Ertai it would probably be very helpful, along with more ways to create tokens for sacrifice (Bitterblossom)
They have strong sizes to casting cost, a strong ability when they are on the battlefield, and when they die they turn into their Temple, which taps for their mana and then heads back with a tap at sorcery speed but with a harder to do activation
So, as tempting as it is, know what products you want to buy and stick to it