Orcs Must Die! Unchained (PS4) - Library-Rinth Weekly Challenge Guide (5 Star with Oziel)
I used Oziel for this, and that's mostly because you get Swiftyhooves on the last wave. He has to be taken care of very quickly here, and Oziel does the best single-target damage out of all 3 given Heroes. Cygnus can perform probably second best, and Smolder is probably the worst choice here (although you might be able to manage her trophy on this Challenge).
Oziel is also really good for this map because I think the Challenge is easier if you try to rely on your Gear to deal damage. This does come at quite the expense to your Mana, and Oziel's ability to siphon his own HP for Mana (using L3) is a great advantage.
The one thing that I think is key to this map is seeing that you can block off the Rift with Barricades, forcing the minions to loop all the way around it before they can enter. You don't necessarily need to follow my exact placement in order to do that, but I would recommend trying to keep enough space so you can put down Tar later.
Although it is possible to use Barricades near the gates in order to funnel them into a single lane, or extend their pathway, it's not really necessary. If you're going to do that, it's best to do it once you feel satisfied with the Barricades and Tar that are around the Rift area.
Wave 1 - This can be a somewhat stressful wave, as chances are you only have a minimal amount of Barricades (and probably no Tar) around the Rift. The first thing you get from the gate is a large group of Kobolds, and they come from two different sides. To deal with this, go to the first place they merge and place down at least Fire Wall Bracers, but Ring of Storms will help guarantee that they won't get by. With Oziel, Desecrated Ground helps this process even further.
Wave 2 - You should start this wave by completing your Barricade "loop" around the Rift, and if you have the Coin, one Tar at the place where it begins. You can use this spot with the Tar as the chokepoint, and do the exact same thing as you did with wave 1 to deal with all the minions, but especially the Runners (combine Ring of Storms and Fire Wall Bracers).
After Wave 2, just continue to place down as much Tar as you can manage, then keep repeating the process of using Ring of Storms, Fire Wall Bracers, and your Hero's abilities to clear waves.
Wave 4 - At the end of this wave I would recommend placing a lot of Tar at the west gate, before you end the Go break. This almost entirely for Swiftyhooves, as you really need to slow him down to make an attempt to kill him.
Wave 6 - Swiftyhooves appears at the west gate, but hopefully you have enough Tar down to slow him down amongst all of the other Satyrs. I would highly recommend using Unchained for this wave, for the sole purpose of killing Swiftyhooves. Afterwards, just bolt down to the Rift and find a spot to continue to clear the rest of the Runners (which is the entire wave) with your usual combination of Gear that you have been using.
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