I personally think you should go for moderator. You were previously demoted and proceeded to cause all sorts of trouble post-demotion including saying things like I should "die of cancer" or "get AIDS". You did approach me in-game and apologised for your behaviour however I don't think it is sensible to give you Admin straight away.
To me, the best way to prove to not only me, but a few other staff members that you can be trusted again and won't have an 'episode' (for lack of a better term) like you did after being demoted before, is to go for moderator and staff for a few weeks and we can monitor your performance at that level.