Some tips for OSH team

Hi, I'm trying to sumarize tips from guild chat, so it will be useful.

Albus as pet (or Axel if isaac keeps dying)
Isaac (Oliver)
Sebastian (Albus)
Nebula (Cain)
Jhu (Fenris)
Martha (Axel)

You want to work on isaac first until he's strong enough to survive and keep the team alive.
After that both jhu and seb contribute equally. In high level play seb does more damage than jhu because jhu damage is capped.
The only one you should substitute in this team there is nebula if she isn't strong but the other are all needed for the team to work.

There are buffs you:

Must Have
buffs in order of priority, since their point value changes every week

Chosen by the Stars
Healing Converter
Keepers Blessing
Astral Shield
Marksman Opportunity
Sphere Energy Unleashed
Stellar Tank Resilience
Immortal Hero

Optional Extras
These buffs revolve around Nightmares... (not worth getting unless you have surplus Valor Emblems )

Survivors Willpower
Dreamers Retaliation
Insomnia
Mages Vigilance
Nightmares Energy (worst)

Trash
only useful if you have the correct heroes trained up high AND have enough Valor Emblems to spend on secondary teams

Wakeful Undead
Ingenious Engineers
Resilient Grovekeepers

Gold purchasable buffs
Not required, but they do help get more dmg on OSH... Only 1 of each is needed I've found (they don't go away after the 1st osh battle)

Defense sphere destroyer
Wormhole suppressor
Meteors of haste
Jumpstart
Defense sphere override