A Few Combos You should always know about.
OK, so this is my first post. If you know these great, if you don't you need to.
 
I will start off with some new combos from the more recent sets and go from there.
 
The first has got to be "Enemy Controller" vs. Raigeki
 
    Ok so your opponent plays Raigeki on you and they have Jinzo on the field, you simply activate Enemy Controller and offer a monster that would die anyways and take their Jinzo. Now their Jinzo dies with your monsters.
 
Second is Bonecrushing Tower
 
    This card ROCKS!!!, with two of them on the field your opponent can't attack, and it's second effect is very accessible now.
 
Which brings me to my next combo which also involves an AST card as well as a few from previous sets
 
    Ok take the last combo and add Spell Economics along with Monster Reborn, COTH, Autonimous Action Unit, DNA Surgery, and Premature Burial.
Oh I get to take your monsters from your graveyard, dont have to pay anything for the spell cards, and since DNA Surgery is on the field they count as zombies, and thanks to my 2 Bonecrushing Towers, I get to take 4 cards from the top of your deck and put them in the graveyard.
 
OK, I will end on a highly overlooked combo, I suppose it is because most people don't use MoF much anymore
 
    Can you say Graverobber, oh were you gonna take that Raigeki?!?!?!? >:)
 
 
Hope these tips help somebody out.
 
 
BTW: In case you didn't know, Spell Economics eliminated the activation cost spell cards that take life points as cost. ie. Premature Burials, Delinquent Duo, etc.