Clash of Souls is among the very view private servers that have the least downtime. According to the developers of this server only had 11 hours of downtime in 2018. With the latest update of Clash of Souls, the server has been moved to amazons AWS Virtual private servers. They are now managed by a group of 15 people who continuously update the apk with new features. DDoS protection from Cloudflare is also added with v10.1.2.
Download all the variations of this server here.
Souls S2 is the most efficient sever but has the least availalibity among all the others.