I've heard that Perlite is used instead of soil mixture. Please help.
What you are proposing to do with your ingredients doesn't sound reasonable and will be a waste. That's if I understand what you want to do with them. If you just mix the bone meal, blood meal and potting mix, they don't add up to 15/30/30 and they are the only ingredients that have a nutrient value. Then trying to make them all into a water mix, along with vermiculite and perlite, which definitely will never dissolve, just sounds like a soupy mess and loss of your ingredients. You would be better off to buy a water soluable fertilizer like Miracle Gro or Peters and use that.
