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Remember, it's a numbers game. You'll be sending messages to dormant profiles, or to women who have a couple of dozen messages in their inbox, so the headline has to stand out too. Also, a bunch of people who would answer, if they read it and liked you, will already be having conversations with multiple other men. If you spend ages personally crafting messages to each woman you send a message to, it's mostly wasted effort, and while you're doing that, the personalised message to someone who hasn't logged on in a month, the person who would actually respond is receiving a dozen messages from other men.
So, generally, have a pro forma message, the opener, and the bit where you say a tiny bit about you.
You can copy and paste that bit.
Always include a couple of things specific to the person you're messaging. Mass spam emails are obvious and don't get a response.
But only a couple of things, stick that into the copy/pasted stuff, and send. And next profile, redraft the personalised bit, and send. And next..
The women you're messaging will be getting multiple messages from multiple men. They're good at wading through the the chaff, and being efficient.
Your goal is to not waste too much of your time, don't agonise over every word, in a message that will likely never be read.
Numbers game.