Artists:

Shima Takashi (嶌隆)
Taka (貴)
Nago K
M.M.

04-45 Giant Robo parody, featuring Gin Rei
46-63 Giant Robo and Ghost Sweeper Mikami crossover, with Tadao Yokoshima x Ginrei and Yokoshima x Mikami
64-103 Ghost Sweeper Mikami parody featuring:

64 Reiko Mikami
65-76 Mikami x Yokoshima
79 Meiko Rokudou
80-91 Okinu (Kinu Himuro) x Yokoshima
92 Reiko Mikami
93 Emi Ogasawara
94-103 Meiko Rokudou x Shoryuki (respectively, my 2nd favorite and favorite characters form GS Mikami)

105-106 cameo from Sailor Moon

107 Mikami
108 Okinu
109 Gin Rei
110 Mikami and Gin Rei

Yuri story here:
94-103 Meiko Rokudou x Shoryuki (respectively, my 2nd favorite and favorite characters form GS Mikami)

Base +14

hello, a question, where did it find this doujin, so I have been looking but I found it much.

Base +7

@king slayer: I have no idea. I have had it in my HD for too long for me to remember where I found it.

Base +12

http://www.doujinshi.org/book/418993/HO.HE.TO-7/

Base +50