How does he fair against Sieg I do well sometimes but then their are times when i cant get all the attacks off and I get tossed in the air and torn to shreds. I know that a lot of siegs moves can be Force impacted pretty easily
Juece, you can have a pretty easy time against him if your playing with the right tools(and certain smaller stages help too asides from getting easier RO's)
If you block Sieg's 88_22b(not at maximum pushout range) punish with 4b, if you are at maximum pushed out range from 88_22b(meaning you block it but at max range(4b punish will whiff, if thats the case then just use 4a+b..any time Sieg does 3(B)NBS~k..ALWAYS punish with 1b/1b~a, you will pretty much get the CH 1b~a evertime if they follow this up with any other NBS options(ONLY if its NOT ws(b)NBS~k)...
ws(B)NBS~k variations are more tricky to play against unlike 3(b)NBS~k(which is 100% safe on block so dont get caught doing /1b/1b~a here) since ws(B)NBS~k is uninteruptable you will get hit and Sieg gets a free CH combo.. just wait for 2nd K(high attack) from ws(B)NBS~k, from here duck and punish with pretty much any ws attack vader has(some moves will/wont hit depend on whether or not if your fast enough to execute them here) Also....
*NEW FIND* well, more of an honorable mention for this match up but can be used against other characters too.. against Sieg if the player is using a lot of things like 6a to range you out(long range high attacks) which is needed for him in MANY if not most match ups... a nice 'lil tid bit that i found out, in which Sieg's 6a is a high horizontal attack it can be ducked and punished on reaction with solid reflexes(which can get tricky and done with any character which can be VERY risky against him).. BUT..if this isnt your cup of tea..this is what I suggest you do..
Sieg does 6a(!OH NO's!) if you know this is one of their main "keep out" moves..have no feah! Vaders 88_22 A+K is HERE!! will trump that ish from really up close/mid ranges. It also has TC properties so use it well!
It allows you to step in either direction of which his move is coming from and then Presto!!.. auto evade!.. this is what this move is meant for to begin with..so you just simple use this against Sieg's long range keep out moves to score free damage and KD..which all sieg players need to use depending on the player/opponent's knowledge
*NOTE*..if you use this at mid/far range make sure to be patient..they could use 66b instead and throw you off from your timing(in which case you can do 88A+K 1p side/22A+K on 2p side..or a simple 1b /A+K~a punish too)..so keep score with your opponents patterns and moves they use at mid/far screen range with him..a good example would be..
..your opponent blocks Vader's A+K for example(high force move that is +0 frames on block) and your opponent believe's that you are going to use something he can trump you with 6a and 88_22A+K will trump it on any +frames and at an even 0 frames..if sieg does a block stun move ..sometimes depending on the follow up attack he does 88_22A+K will work sometimes..but not always.
A couple of things to keep in mind are:
1.keep an eye on your force meter, you want at least half of your meter before using this move at all
2. unless you know you get the win/RO and want to risk losing force for next round..dont use this out of its element.
Over all i think Vader has the upper hand in this match up. Keep Sieg outta throw range is important in this match up(even if you escape the throws i gets tricky for any character.. but anything he does from afar can be beaten/punished by Vader( unless if its a block lock stun like ws(B)NBS~k)which even then with a tab bit of anticipation you can trump ws(B) stuff with 1b/1b~a..even at Close/mid quarter battles..this is an up hill battle for Sieg vs Vader with all his TC moves/evades
EDIT: if you play a lot online instead of offline, these will frustrate the hell outta you!...so practice this where you will get the results you want in regards to the way you prefer playing(unless the connection is super good!), whether it be online/offline, IMO, practice this stuff offline for best results.