Trim some skin and most excess fat from the chicken thighs using kitchen shears or a sharp knife; optionally make a few short slits through the skin into the meat.
In a bowl or large resealable bag, whisk together the olive oil, lemon juice, garlic powder, Spike Seasoning (or other all-purpose blend), dried basil, dried oregano, onion powder, dried sage, and black pepper to make the marinade.
Add the chicken thighs to the bag or container, pour in the marinade, seal, and refrigerate for at least 6 hours or up to a full day, turning occasionally to coat evenly.
When ready to cook, drain the chicken in a colander and discard the marinade; let the chicken come to room temperature while you preheat your cooking method.
For air fryer: preheat to 360°F (185°C). Arrange chicken skin-side down in the basket and cook 8 minutes, then flip and cook 6 minutes. Check for over-browning and rearrange as needed, then cook about 6 more minutes or until skin is crisp and internal temperature reaches 165°F (75°C).
For oven: preheat to 400°F (200°C). Place chicken skin-side down on a rack set over a baking sheet. Roast 10 minutes, flip, then roast about 25 more minutes or until skin is crisp and internal temperature reaches 165°F (75°C).
Use an instant-read thermometer to confirm the internal temperature is at least 165°F (75°C), then serve hot.