Be careful with the RAID feature "Faction Guardians" which gives a bonus to speed. This can mess up your existing Clan Boss Speed-Tuned teams by increasing the champion's speed attribute.
For example I had geared my Fenax to 157 speed for the Myth Heiress composition and his speed increased to 163 - a 6 point increase as per the Faction Guardians bonus. Remember, even 1 point of chance might already be enough to completely break your Clan Boss team.
Temporarily remove champions to "lose" this bonus until you re-gear your Clan Boss Team champion speeds (probably best to wait until the next Artifact Upgrade event).
