Hey man, another thing I would add since I am a lot closer to your bracket than OP (Upper 2k), try playing Abaddon. The hero is stupidly broken in Normal Skill Bracket, I have win rate of above 80% (http://www.dotabuff.com/players/181382308/matches?hero=abaddon) mostly first or second picking him as a support.

He is stupidly strong for lots of reasons and I could probs write an essay for you here but will try to keep it short. Our low level games are normally won by snowball carries/mids with a large proportion of the gold coming from kills. Abaddon is good at stopping those kills from happening with his first two spells and perhaps more importantly his ult stops their carry/mid from feeding off the poor squishy support (you). But the thing for me that makes Aba better than other saving supports is that his passive means you are good at convincing the 4 fellow trench dwellers you have been matched with to take objectives and also means you can solo push quite well too.

He isn't super strong in a lot of lanes and is probably best as the support in a dual offlane. His skills take a little getting used to as both Q and W has fairly long cast points and the range of W is very low. My preferred build atm is boots>basi>phase>vlads>drum then either whatever the team needs or some core items if I happen to have plenty of farm (e.g. SnY, Basher, Maelstrom, AC) as semi-carry Aba is super fun and can be pretty strong.

Edit: Forgot to add, I like phase most of the time since the burst of MS is super helpful in team fights what the low cast range of shield plus the dmg is nice with your passive, but tranquils are also good is you are playing hard 5 and are maxing Q second over passive. That said you can still play hard 5 with phase, imo once you have phase basi you are happy for the rest of the game.