This was the last achievement I earned. I thought this might come naturally but it never did for myself. There are certain guidelines you have to follow for this. I read on Reddit and Steam the exact same answer so I'll post it here --->
********** After the end of the in-game day, you'll get the table with the results. There will be different bonuses. For this achievement, you need to have almost all of them (except for new omensight). The easiest way to complete is right at the start of the game, on the first day with Draga.
Regarding the Most Valuable Player achievement, getting the Stylish Fighter bonus can be pretty hard on the first day with Draga so here are what's needed to get the bonus.
Ingredient used (any bomb, column or activate a trap): 3 used
Companion ability: 3 uses
Combo : 2 different types
Ability (once they are unlocked): 4 uses for each (i.e. Phantom Blast 4 times, Phantom Grasp 4 times, etc.)
So basically, use bombs a lot, use Draga's ability a lot, and get combo bonuses (10x sword bonus and Phantom Blast bonuses worked for me). It doesn't really matter if you get hit, as long you don't die. **********
To clarify, you need to make sure on your 1st day you pick Draga and NEVER die. Reloading a checkpoint seems to count as dying so you must do this in one complete run. The level is decently long so I recommend playing it at least once or more to become familiar with it and make it easier for yourself to go through.
For ingredients, the level is full of bombs. I personally denoted all of them to make sure I met the requirement.
The companion ability can be used anytime. It does not need to be used with enemies. So you can just sit somewhere empty of enemies and use the ability, have it recharge, use again, and repeat. I want to say I used it at least 6 times to be sure.
Now combo and the 2 different types needed are: light, heavy, heavy and light, light, heavy. Make sure to repeat those 2 combos playing through the level against enemies.
Finally, the only ability you will have access to for the level is Phantom Blast (hold X and release which shoots a projectile). So you need to make sure when you are using your combos on enemies that once you have 1 full bar saved up that you use that full bar for Phantom Blast. For you to build up your power bar, you must make sure to not get hit by enemies or take damage from bombs/columns. At anytime you take damage, your power bar loses a percentage making it more difficult to obtain.
For the Explorer Bonus you need to open chests. So as you play through the level, actively explore the level. The first chest I remember you can access is at the beginning when going down a hallway with Draga. An enemy will approach you but do NOT kill the enemy. Let the enemy go to a lever and use it. It will open the cells and give you access to a chest in one of the cells. There is another chest a little further in the level after opening a door and will be on your right next to a ton of breakable pots. To your left will be a series of platforms you have to jump to signaling you are in the right area for the chest. The last chest I remember is obtained by accessing a sealed orange door. Towards the end of the level, you will learn how to open orange doors aka a seal. Once you learn this you will progress to a point where you get on a vehicle and move in a linear path. The vehicle will stop at one point and you have to get off to defeat enemies and stop the enemies from detonating bombs to destroy the vehicle. Once you stop the enemies from trying to blow up your vehicle, you can explore the area. Do this first and do NOT get back on the vehicle. Towards the left side of this area will be an orange door. Open it and there will be another chest inside. These are the only chests I remember. The level is mostly linear and small. Just look around before moving on. I had no issue getting the explorer bonus the 3 times I played the level.
I personally recommend playing the game first and learning how the game plays, the enemies, and controls. You can make a separate new game save at anytime and attempt this achievement whenever you want to. Now you can probably get this achievement on other levels but I found the first level the most convenient and easiest.