Eula Lawrence - The Physical Damage Queen
Eula is by far the best physical character that can be used in a niche team but with good investment, she can get the job done as a hypercarry. All she needs is a team with another Cryo (mostly battery or support works fine), Electro for superconduct and a flex slot which I will get into the teams section.
Weapon Tier List for Eula
Artifacts Set for Eula
The 4 piece Pale Flame is her best in slot (BiS) that can take full advantage of the 4-piece bonus. Since her skill has a relatively low cooldown which you'll be using a lot, it's very easy to stack the attack percentage bonus (up to 2 stacks). Once she gets all those stacks, the 2-piece effect (physical damage bonus was 25%) will increase by 100% which is a lot of damage. Keep in mind that the stack duration will last for 7 seconds. Even if you use your hold skill, you'll still have the stack that can be activated every 0.3 seconds.
What's great is that this artifact set can be strongbox so the chances of getting the right stats is slightly increased.
Main and Sub Stats for Eula
The stats that you need the most are Crit Rate, Crit Damage, Energy Recharge (ER), Attack Percentage Bonus and Physical DMG Bonus.
For the Crit ratio, go for 70 Crit Rate and at least 170 Crit Damage and if you could go higher on Crit Damage then go for around 180-200 but please do not stress yourself just only for crit damage.
Energy Recharge should be around 130-140 becuase you'll need her burst to be up at all times so you can use it for the next wave of enemies. Unless if you have Raiden Shogun then 120 ER should be fine.
For the Goblet piece, ALWAYS go for Physical DMG bonus main stat. No questions asked
Talent Level Priority for Eula
You should crown both her Normal Attacks and Burst since that is needed for overall damage. No need to crown her skill just at 8-9 is fine unless if you're a simp then by all means
Characters that supports Eula
Rosaria
This is an obvious one since you see abyss clears with her and Eula. At C2 her burst duration lasts for a total of 12 seconds, makes it enough for Eula to trigger her lightfall sword and increases Eula's crit rate thanks to the Element Resonance. For C6 Rosaria makes Eula even stronger and better that it decreases the enemies physical resistance.
In short, C2 is a must for the burst duration and C6 for the physical shred.
Bennett
I know you don't like this character but hear me out first. He is relatively simple to use as long as you use his burst, it increases the attack percentage which is "bennett-ficial" (get it?) for Eula's overall burst damage. C1 is all you need but he can still work fine at C0 however you need to be above 70% HP at all times for his buff.
Mika
If you don't like Bennett then Mika is another option. Although his C6 is very crucial because it deals Physical Crit Damage which is nice and easy to use, but the only downside is that his buffs only works for ON-FIELD character meaning that if switch out early from Eula's Lightfall Sword, it will not be affected. At C0 is perfectly fine since it's really hard to get a specific 4-star character.
Raiden Shogun
Another obvious one although it doesn't have to be Raiden but you can get away with Kuki or Beidou. The reason why Raiden is to proc the superconduct more easily and also Raiden can work as a sub-dps (assuming if she's using the emblem set) because of energy recharge that way she, Eula and other teammates can have their burst ready.
Furina
It looked kinda weird for Furina to team up with Eula but trust me it actually works and I've seen clears with Eula and Furina. What Furina does for Eula is that the more damage Eula takes, the more Eula's damge will deal to her enemies
Zhongli
Very optional if you want to avoid interruption.
Team Compositions for Eula
Note that the Team Composition that I showed here are examples only. Feel free to check out other Abyss Clears on what characters they use.
Constellation 1 or Weapon?
If you have a good weapon like WGS or Beacon, constellation 1 is needed. Otherwise you can go for her weapon.
Or better if you can afford both then go for it!
Constellations for Eula
C1 is a good stopping point but if you want to go further then either C2, C4 or better C6 will make things more easier. I'll give a quick summary on what they do
C1 - Every stack from skill increases Physical Damage
C2 - Skill's Cooldown decrease (Press/Tapping CD will be the same)
C3 - Burst Level increase
C4 - Lightfall Sword damage increase from opponents under 50% HP
C5 - Skill Level Increase
C6 - Lightfall Sword Stacks start at 5 and a 50% chance for stack of energy
Spiral Abyss Clear with Eula (feat. Navia)
Since I haven't done the 36 Star Abyss for 4.7, here is my very first 36 stars that was taken in 4.4 for the time beingConclusion + Personal thoughts about Eula
Eula is honestly not that bad to use. I mean I know that sounds biased coming from a Eula main but I'm just saying. For literally every Main DPS in Genshin, they need to be invested really well and that same goes for Eula. Just because she's "Physical" does not mean she's bad it's just that you need the right team comps for her to work and that's one thing you can't avoid. I never benced her when I finally got her after such a LONG time for her to get a rerun.
Eula has such a great character, personality and she's elegant so that way I don't let other people tell me otherwise because of the "meta". My opinion will always be Waifu over meta and my opinon stands till this day.