Sorry this is late, but I searched the forums for Syndra to look at skin concepts when I saw this. I'd say learn her combos well and invest heavily in cdr. My runes always include 10% cdr then when I build ahtene's/morello's and boots of lucidity I have 45% cdr (with the mastery). Make sure you're building right for your matchup (abyssal into bad matchups like fizz). Also make sure you're combo-ing well. Something I like to do is q-w-q-through the w on them-e-ult. She has a lot of combos that guides may help you with. With 45% cdr you can easily get 6 or even 7 ball ults. That's easier with Athene's for the spell spam. Make sure to play safe when your e is down and against melee opponents take the attack speed mastery for auto harass. A lot of it is just hitting your q. I also level q before w at level 3 then take w at 4. Always make sure to auto after you stun to proc thunderlord's. Also against certain champs (lb, fizz, yasuo) don't even try to hit stun, just e when they go on you and it will negate the dmg and you will win the trade by kiting them back.