well, aside of the video recording i don't think i'll do expert alone as my light team is my weakest and it doesn't seen like a raid that we can just auto-ability it and win at ease.
so i've thought to use my light team for surein red expert as belobog's cure is a must there+use behemoth in my team (not main)
also i'll go with mordred with maiden prayer as extra ability in a battle outside burst time.
so mordred, uranus, belobog, baldr and nike in front while urania and inanna in sub team.

as for burst time, i'll use siegfried for sure, the question is should i use her in light or dark team?
in light team i have less assault weapons and their skill level are around 1-9, ofc her weapon will be SR so less burst damage.
the only good thing in it is the elemental advantage.
or should i go with dark team that i have more assault weapons, skill levels 11-12 (lance 20) and SSR glaive to hold as weapn (just 2 stars though)
so i guess in general this team have more overall attack, more assault weapons and higher skill level, but no elemental advantage