Triangle Strategy: Battle of Twinsgate | Hard, deathless/reviveless, no items, no quietus

This battle honestly isn't that hard, the main problem I've had is grappling Exharme, he was being annoying and going to kill the bottom path folk.

Tips: This map isn't really hard, it's incredibly disjointed, if you rush fast enough with jens, hossabara/time child, or using benedicts bird of prey, or simply just using characters with jumping abilities with a lightwave for exharme, you can very easily get to the left side of the rocks and demolish the enemies there. It's incredibly disjointed, not only will you fracture the enemy into 2 groups, the left and right, but the right side will fracture into a smaller group: Upper level and lower level, the lower level is a complete joke, high ground advantage makes them honestly not a problem, pack an archer or two, and they can't really do anything. They can try to run away, but it's unlikely they'll be able to help for the rest of the battle

The upper level enemies tend to rush across the gate, some might make it to the other side, these guys will get demolished, make sure they don't run away, execute them and move on

Left side: The left side has 2 elite blades and 2 bowmen, going far enough to the rocks make reinforcements appear, an elite pike, shield, and bow. You should probably have some form of shutdown to stop the bowmen, and try to use lance or ranged attacks in general to kill the swordfighters, you can box in the shieldbearer and pikeman, they shouldn't be too bad, just watch out for double thrust from the pikeman. Especially if they're eyeing up Exharme.

Sycras: Sycras will mainly just stay and cheer on random folk, he's not that bad, he's no offensive powerhouse, and has literally 0 AOE at all, immobilization can be tough, but even a single healer can pretty much negate his damage, he's also not immune to fury, and due to the length of twinsgate, it's often that you'll be fully stocked on TP, Sycras doesn't move until you get about halfway to twinsgate, then he'll start approaching, he has a healer and mage as a bodyguard, Jens is especially helpful because he can try baiting and switching on those two and drop them below or simply end their turn and thrust them into your tank to get mauled. Sycras himself once he's alone will be on borrowed time. (Note: Sycra's cheer ONLY buffs strength, not magic, yes, he can be a TP battery, but if you can tank a few hits from a mage (with your extra TP you get from having the dead turns traversing the map) you should be fine. Suggestions for killing off Sycra's mage if you don't wanna try and use jens or not really working out well for you:
Flanagan's exceptional mobility can be used to crush the mage and healer pretty well and allows you to surround sycras.
Milo: Evade detection and moon jump gets around sycras
Groma: Evade detection along with a 90% fury chance is crazy, it's very reliable, even if she gets struck by Sycras, Sycras is hardly an offensive powerhouse, so you can tank a hit or two even from apprehend.

Surrounding Sycras is ok too, especially with preperation, Jens can make ladders downward, any character like anna, maxwell, trish, etc can go down the steps and come up the other side for a flank attack.

TL;DR attack left side, right side splits, get 1 or 2 units to kill lower half of right side, then cross over bridge and shutdown/destroy Sycra's guards, then whoop him.