How to play Sylas with more fun.
Go duo bot with a mage support. The mage support will compensate your lack of range, and will set up cc for you. You can have 2 enemies that you can potentially kill with the mage support. which goes well with your AOE passive. Also, support/ADC ults have ridiculous ratios of AD/AP so you can benefit the most of it.
My favorite was when Sylas took a pyke ult and raked the mage support (My velkoz) 300g for each kill, which made snowballing accelerate to ludicrous levels. Thresh, leona, sona ults are also a near Death sentence to any ADC with huge AP ratios. Have fun and be creative. He doesn't need to solo lane.