These days I use commercial masalas for meat starters. For tandoori chicken Riya's Tandoori Masala Spice Mix, in water. Approximately 35 g / kg chicken. Plus G/G paste (1.5 TBSP) dried mint (1 TBSP). Freshly ground black pepper and fresh lemon juice, to taste. Preema red. Then add the veg oil and a slosh of pure mustard oil to gloss. 24 h marinade. Perfect taste, every time, imo. Old India do a similar Tandoori Masala mix, but it's more salty, so care is needed.
Rob