Chariot doesn't drop anything, the outcome is the same whether you make it fall down the hole or not. The best place for titanite chunks it from Chloanne after you finish the game, she sells an unlimited amount for 6,000 souls each. Before then, I find the weird hand monsters that come out of the pools in Black Gulch to have the best drop rate for them, and they'll also drop large shards. For twinkling, it's best to farm the Archdrakes in the Shrine of Amana. They have a really high drop rate, especially with item-discovery boosting gear equipped. Dragon Aerie is a good place too, the crystal lizards drop some and the dragons have a change to drop them. There are a few ways to boost the damage of Sunlight Spear, assuming you aren't doing these already: - Make sure you have the base miracle requirement for it. If it's spiced down, it will lose damage until you reach the original requirement. - Chimes will affect the damage. I believe the Dragon Chime is the best for miracles, but whichever chime you use, infuse it with lightning if you're going to be casting miracles more than hexes. - The Sun Seal will improve miracle damage, and the Lightning Clutch Ring will boost your lightning damage. I don't recommend these though, the benefits will be minimal and aren't worth the ring slot.