Day 1
The Executor struggles a little early because he lacks HP, so if you miss one deflect, it can put you in the dirt. That's why we aim to farm a little bit outside of forts and cathedrals until you’re either level 2 or 3. After that, we aim to get both Flask upgrades from churches if they are on your route and to do as many forts, camps, and cathedrals as possible. If a mine is on your route, do that too, so you have an epic upgrade shard for later when you want to get an epic weapon. We aim to be level 7-8 minimum by the end of day one.
Day 2
On Day 2, we want to start looking for either a Field Boss, Castle, or Ruin. We can run towards a Crater if it spawns. The Executor does not need this unless you have
Rivers Of Blood found on day 1 and want to upgrade it to legendary.
Keep stacked up on Consumables, but don't be afraid to burn through them.
Keep looking for weapon passives and try to get as high a level as possible for day 2!
If you have trouble finding a good Weapon, try the castle in the middle. There is a boss at the top of the castle, and at the bottom, they both drop purple-tier loot, so you should be able to get a good Weapon from that! If you kill the bottom one, a gate opens to a room where you can choose a Talisman, so that you can also get a preferred Talisman.
Day 3
With this guide, we are taking into account that you fight the boss Gladius, Beast of Night (Tricephalos). Be sure to check the shop and level up before you enter the arena!
Gladius, Beast of Night (Tricephalos) is most dangerous at mid-range because of his swipe attacks with his sword.
The Executor can deflect all of this, so it should not be a problem, but be sure to keep switching on and off for your deflect stance, since you can't run during it. Once you are in his range, the only dangerous attack you can't deflect is his grab; for the rest, you should be fine as far as Phase 1 is concerned.
Phase 2 is where you want to pop your stamina Consumables, which I mentioned in the consumable list. Mainly because 3 bosses will now attack you, meaning you need that stamina for those deflects, if you do things correctly, you can easily stagger the boss for critical attacks.