However, I thought I'd share with you some story notes on Red Hood Rider to fill the gap. Both of them are things that already existed, but were never written down. The first is that Dale uses as his primary weapon a Katana, but he's a skilled dark art master, able to conjure up high-level techniques like a solid rain of dark arrows, or later after seeing Ruby perform her ranged soul suck, developing his swarm of stingers as his own variation on the technique. Things like that.
The second is also vampire-related. I mentioned before that some vampires have aesthetic fangs. What I didn't mention, but which comes up in a story arc where a vampire tortures someone, is that vampires can in fact drain blood from the mouth, and it's how they prefer their non-fresh blood intake. The thing about drinking blood is that it is inefficient--it goes into the digestive tract before being absorbed into the body, whereas when sucking blood through the fingers, it goes straight in.
However, it does taste better, thus why some vamps do it. It should be noted, though, that on a live victim, biting is considered incredibly cruel. The claws a vampire drain through are akin to a mosquito: the blood is drained, and the wound is sealed off. When a vampire bites the neck of someone, they're actually biting them, and it takes a dark art to seal the wound back up. In other words, it's extremely painful and messy, all for a meal that is far more dangerous to obtain and gives less of a reward.
Thus, why through the fingers is preferred. It's easier to cut into a victim from the hands than bite into them from the mouth, after all. Incidentally, this is also why feeding from the neck with a bite is considered the ultimate act of vampire intimacy with a donor: it requires incredible trust on both party's ends, a gentle, loving touch, and a fair amount of control and willingness to comply. Basically, finger-feeding is the default for donors because there's no inherent meaning to it, but taking the risk of pain or even death that mouth-feeding can produce is an extreme act of love, because the only gain is in pleasure.
I wanted to explain these in more detail, but it's 2:40 am right now, and I kinda want to go to sleep.