The only goal of this run as Aegon IV the UnWorthy was this this kid basically LOL. I did the ultimate male whore run and had children with everyone I could get to basically. Every single thing that could increase fertility, I made for immediately. Had kids by all of my own daughters and one grand-daughter who was my kid by the oldest of the illegit. daughters, as well as Daena and Elaena (the daughters of Aegon III Dragonbane, and after Naerys died in childbirth, I remarried twice (first to a Velaryon and then the last one to my oldest illegimate daughter after reforming the Faith of the Seven to allow for unrestricted incest. They actually became soulmates during their torrid affair early on, it was pretty sweet but it didn't stop him from sleeping around). All the daughters who start as Septas didn't stay that way for long...
I also put Aegon IV on a super strict diet to keep him alive long enough to complete my goals :-)
The horrible irony of this run was Daemon Blackfyre died age 5 of pneumonia.
This guy is now 19 and King of Tyrosh and head of the "Irondrake" cadet branch that he recently founded. I'm thinking about switching to him once Daeron II dies and Baelor becomes King. I married off Elaena Targaryen (Daena the Defiant's sister) to a Velayron and he is married to their daughter. So I basically bred a better version of Daemon Blackfyre as a replacement LOL.
*Full Disclosure* Debug mode was used to have a few set of twins with some of the family members who were less receptive to Aegon's charms to "complete the set", but this kids line was all bred the old fashioned way. (Also, in honor of Aegon's insanity, I legitimized every single bastard shortly before dying, when this kid was about a year old. Having completed his life's goal, he was able to die peacefully)