@Azenclor: Exp scales with your attack power so it will increase slowly.
In the beginning normal attack and heal should be best. Later normal attack again weak opponents and defence against strong opponents is best. If you are very high you can go with quick attack only and heal at the mystery shop. (You need a lot health for that. I think at least 20k before that method is worth is.)
@TrinityX: This guide is incomplete and has a few mistakes. Better use my profile. (Meh that sounds like I want attention. This is not the case. Well maybe a bit. *g*)
Medium. With easy you won't get enough point.
@Infinite_Chaos: Could be. I copied it from the comments and from the forum. I'll add the newest archiement now. So take a look Ksmrulz. ^^
Your example is very easy. ;)
you just need a bit luck with the questions. Well I can't get more than my current score (~260k) but I'm not the best at that anyways. :)
@alExx_: The president is not very great. Only buy him when you can afford it and just for the archiement (he also gives 300% progress boost so you may want to buy some cheaper boost to get it up to 600% pretty cheap).
More than 1 Quest per day would be nice. Maybe in exchange of a higher cost the more you play. The 40 Quest archievement otherwise will take 40 days which is quite a lot. :(
 "Anti-Idle: The Game"){kind=icon}