How would I set up GSA blast for Tier 2 ?

Hi all, I just bought a package of high DA backlinks for Tier 1 as below about 2 weeks a go, but now it comes down to doing backlinks for Tier 2. And I have several questions on how to do the Tier 2.
– How should I generate the keywords for tier 2, using LSIgraph is ok ?
– For content, should I prepare articles or use GSA to search online
– Which engines/platforms should I use for Tier 2
– I got 60 backlinks for Tier 1, how many backlink should I do for tier 2 and tier 3
– Is it ok to use blog comment for tier 2
– Can anyone recommend a good verified list 

Thank you for your help.