In this build, as you have already guessed, we use Ruego al Alba as our main weapon. We need to power it with lightning using the ''Galvanic Plead'' resonance (put The Punished One + The Tempest figures next to each other on the same shelf). This manipulation will give us many advantages and make Ruego even more effective. These advantages are:
-DPS will be highly increased. Blood Pact will heal you a bit more and will be dealing much higher damage than mystical resonance does. In addition to all this, when you hit one enemy, all the damage will be distributed to others, which will allow you to more effectively clear out entire crowds.
The effect of health restoration will increase even more due to this.
-Mirror Effect: If Blood Pact is active, if you hit objects such as bells for Veredicto, mirrors for Sarmiento and Centella, even objects that are placed around the locations, then hitting these objects will cause massive damage to all enemies in the room. Not to mention that it will very quickly maintain the player's health. If you'll get crit by mirrow you will be healed even more because of ''Jaloque'' altar piece placed.
-Increased effect of bile flasks: all thanks to the ''Nacimiento'' altar piece that increases Bile Flask healing by +20%.
-The player's health will be constantly maintained: as I said, if Blood Pact is active, when hitting enemies you will restore even more health due to lightning resonance, in addition you will be able to heal from breakable objects, even from the meat walls that Ruego breaks. And since the damage is distributed to all enemies in the room, the healing effect will be doubled. Also, ''Jaloque'' altar piece that is used in build will make critical hits heal relative to the damage inflicted and lightning damage will provide us with more crits.
-Almost infinite Blood Pact: perhaps the lightning Blood Pact is the most important part of the build, because it does the wonders I wrote about. And we can make Blood Pact infinite with the Endless Wrath resonance (put altar pieces The Partisan + The Demented One next to each other on one shelf), which in turn will extend the duration of Blood Pact for each kill. The effect of the extension is also doubled, since we hit all enemies in the room at once.
-One-shot probability: If you gain enough height and then you will land ''Weight of Sin'' on your enemies, you will have a high chance of killing crowds in one hit. If ''Blood Pact'' is activated, the effect will only be amplified - both in damage and healing.
-Destroys bosses in seconds: I am very good at playing metroidvanias. My combat and parkour skills are at their peak in these games. So if you can play beautifully and not spam one button beforehand, getting punched in the face every second, but make combinations of variable blows, bosses will die in less than a minute, most often even less than 20-30 seconds. So, i killed the first boss from the DLC in half a minute without even blinking an eye.

So, let me reveal the secret of all the resonances of this build. Here they will be presented in text, a little below there will be a screenshot for your convenience. First I will write their name, then I will write from which altar pieces this resonance consists.
-Galvanic Plead (The Punished One + The Tempest) - Blood Pact imbues the blade of Ruego Al Alba with lightning.
-Endless Wrath (The Partisan + Demented One) - Killing an enemy during Blood Pact renews its duration.
-Ascending Wrath (Previously, the second Jaloque's favor was used for additional damage, but after the release of the DLC, everything has changed. The new resonance will provide us with constant additional damage that will gradually increase.) (Tirso + The Mercy ) - Each successful blow with any weapon progressively increases damage inflicted for a limited period of time.
-Jaloque's Favour (Any figure of third altar piece category, in my case it is Nacimiento + Jaloque) - Increases Ruego Al Alba's strength.
All the locations of the altar pieces that were used in this build you can watch on YouTube. Screenshot with this setup:

After reading all this information, you can test this build yourself, I'm sure you'll like it. If you liked the build, be sure to support me by subscribing, adding to favorites, pressing the like button and writing a comment, I will be pleased. Also, in the comments write your build ideas, I will definitely test them. That's all for my guide, have a nice day!