Attn: SEO Tacticians ~ Best way to pass "Link Luv" from Tech Blog to a Dating Site?

Hello, Warriors, I could use some advice on this one:

I have a Blogger site that's been inactive for months. I started it back when I didn't know anything... I was just following the social blogging crowd. It's PR 0, with only 14 backlinks or so.

The thing is, the content is rock-solid tech topical stuff. I'm thinking it would be relatively easy to jumpstart with a bunch of legit blog commenting on Very-High-PR Tech Authority sites. I can speak the lingo. And I can post under my own name.

What I want to do is use it to feed a new dating CPA site ~ can I do this in just one "hop" (meaning no intermediary sites)? I'm a little concerned that if I have my "Guest Blogger" alias post on the tech homepage about adult topics, my On-Page relevancy will conflict. Is this clash of niches enough to raise a red flag?

I don't just want to stick a link in the footer, because I've heard that Google is deprecating footer links these days...

Suggestions?

Ideally, I'd like to get the tech blog to PR 5+, then start backlinking the buh-jeezus out of it with dating anchor-text links to filter down to my money site.

What's the best way to do this w/o getting G-slapped? (Thanks in advance).