We had this thread moonths ago.
http://www.smashboards.com/showthread.php?t=206351
But it's pretty old, so it should be no problem starting a new one.
I think that jab should be in at least middle, it really is good for mixups and interrupts, but it must be cancelled. first jab, cancel to charge dsmash can punish people who spotdodge a lot, and jab cancelled to jab can interrupt and punish response time. :]
You shouldn't be using down b too often either, so I think you should drop it a tier, into high.
Dtilt should be moved into high, it's a speedy alternative to utilt and works as a good mixup, punishing people who spotdodge or otherwise defend against utilt.
I believe that you've completely underrated dair, when used from a very high distance (in the top blastzone) it generally autocancels with the floor, meaning a quick and generally safe recovery to the stage. It also is the host of a respectable lock on Snake and Bowser. Its multiple hitboxes can also, like utilt, catch people by surprise, but takes on a different play as when your opponenet sees a ZSS jump, they immediately think
uair.
So my version is:
Top:
Uair
Bair
Dash attack
High:
DSmash
Plasma Whip
Fair
UTilt
DTilt
FThrow
Flip Jump
Grab
Middle:
Plasma Wire
Nair
Paralyser
DThrow
USmash
Dair
Jab
FTilt
Bottom:
UThrow
BThrow
FSmash
I got rid of Low tier because I didn't believe thateither of the moves there (Dair and FTilt) were really that bad as to be rated lowly. They're slightly more situational (Dair and FTilt) but definitely not bad.
EDIT: Looking back at ph00t's list from December last year, it's really interesting to see how our mindset and metagame has developed since then. I'll quote his list and do my annotations.
Everyone else was doing move tier list, so I decided I'd be unique and elitist and do move rankings, instead. They look exactly same, and serve pretty much the same purpose, but they're different, I assure you.
Top
Plasma Whip - haha, this pretty much encapsulated our metagame back then.
Dsmash
Uair
Bair
High
Flip Jump
Dtilt
Paralyzer
Fair
Dash - this is interesting, I recall the use of dash attack being discouraged due to being bad on shield. It seems strange that it's so high even without any knowledge of locks. But I guess dash to dtilt/utilt was known, so it's probably adapted from that mentality.
Jab
Plasma Wire - CAKE COMBO!
Suit Pieces
Utilt
Middle
Ledge Getup >100
Ftilt
Usmash
Nair
Dthrow
Ledge Getup <100
Jab Combo
Fallen Getups
Pummel
Low
Fthrow - Oh, how you've changed completely.
Bthrow
Dair
Fsmash
Bottom
Uthrow (remember up throws?)
Discuss and whatnot.