First, I love the gate, very well built. Nice and spiky.
Second, I voted to go around, and to bring just a few people along. This is no place to get caught alone.
Third, it appears I am the first person to try to name every creature in your pic:
From right to left:
Undead, One of your new unnamed "frightening cyborgs", Your lovely new Tinycrab, a Pyro, an unnamed red mutant, A boulder-crab, A HP troll with a pole-arm that that has not appeared an any previous sessions of IA, and is unnamed in this one, A Djander Bird, another Undead, a zombie-looking dude that has not appeared before now and is unnamed, a vomiting slimy humanoid, a Trondosaur, a Weezlet, a runt, another vomiting slimy humanoid, what appears to be a runt (it's hard to tell behind the fire), an unnamed robot (somewhere between a flame-bot and Bot 99), a Thorny-Granyl, the other "frightening cyborg, an unnamed gray thing- probably a mutant, a pyro, another pyro, a black undead, a runt, an unnamed monster-looks like a combo between two of your zombies, an unnamed bane headed scarecrow I have never seen before now, another new creature-looks like one of your mutants grew a beard and got a change of pants, an undead, a creeper, a queen runt, a new jumper, and last, yoda-also new and unnamed, although you did previously have an abomination with the yoda head.
-Whew. It took longer to find all of their names than I thought it would. Or at least as many I could, some of them had no true name, just a description, and some had no description at all, just the picture.