For the dressing: In a small bowl, mix together the grapeseed oil, olive oil, agave, garlic, oregano, parsley, rosemary, thyme, cayenne, lemon juice, 1/4 teaspoon salt and black pepper to taste. Set aside.
For the salad: Combine the mixed greens, arugula, cilantro, red onions and tomatoes in a large bowl. Add 1/8 teaspoon seasoning salt and black pepper. Drizzle with vinaigrette and toss well.