Well blended, you're allowed 3 adsense units per page (to my knowledge). To my knowledge also the advertisers in the 'gaming' niche also use a lot of graphical ads, these ads tend to have a better click thru, my advise is to get a sidebar graphical adsense ad up and maybe one on the footer.
Placements are pretty cool, they blend really well with the theme, how many google ad's do you plan to show on the page? are you just sticking to the one in the header?