In looking at the 100 row fir 7.2.5 it would make sense to buff siphon life to get us competitive with whatever benchmark and make it single target only. Deaths Embrace is a great multi target tool. SC is the compromise. Otherwise DE and SL are doing a similar job and possess similar strengths and weaknesses.
Plus c'mon, balancing aff's single vs multi has always been a problem. The other way to do that is leave siphon as is on 100 row and buff haunt for our single target since it's very nature is a single target only buff. That unbalances the 15 row so the SL single target only method seems smarter. Plus then you avoid pvp crying when you have SL on everything with a hp bar...