try this way at build links ?

Let me share with you on of my best black hat Seo,
This strategy is depends on build links using 50% you keyword and other 50% mix long tail keyword.
what is number links you will build ?
I was building 25 links from 5 same nich forums every Day, I search for high PR pages and i put my link on comment.
I did the same way for 20 Days and i find out that my artical was ranking on position number 2 for medium competition keyword.

That's it Try this strategy and tell me your results .

note ( chose only high PR forums to get better results )

So how many days it requires to rank 2....assuming u are building 25 daily so if you keyword ranks in 2 in 30 days then 30x25 = 750 links..am I right ?