Playing aggressive then slow the pace, keep blocking and retreating... then start to run and stop before the enemy notice the change... Playing Siegfried at is full isn't about "safety" its about "guts". If you are a true hero then start to save some courage but more than anything use wisely. Multiple Stance Changing can get your opponent dizzy, use that to your advantage... canceling the UB into throw or into 1K or into 6A changes the opponent mood too... but forget all those advices; just keep playing till you can find a style that fit with you and makes every match fun no matter the result.
If some of you want a very useful advice then prepare yourself to study... if you want to win then study all the characters(not only the dangerous), how to punish or step or block or evade every move in every possible way and practice your timing to any possible counter strategy from your opponent; when you start to feel the pain then start again till you can't feel the pain no more(practice is painful)... try to protect your health as much as possible without getting your orb broke or even red flashing.
In my last match against some sophitia player, I couldn't connect any good hit in the first two rounds... in the third I start to use 1K and FC2A, then using 2A_B+G after hit check... at the end the Sophitia player had to change his style(guard and punish) and start to guard and wait... he wait for me to end this awful game style but I didn't change and at the end I won... a win its a win no matter what ugly/low/dirty strategy you use to do it. Put that in your mind first, cause if you have already accepted the lose than there's no more hope for you amigo.
It seems our tastes in battle differ, If you yourself would admit that you had to play dirty to win, personally I'd rather take the loss. Results are only consequential in tournament play, outside of said format, sportsmanship comes back into the equation. In my experience, show respect for your opponent, ie. fight cleanly, be courteous and generally they return the favour.
Undoubtably many would argue that nice guys finish last. Maybe they do, but if I am to finish last with a clean conscience, then so be it.