Add more Pariahs and add an Aegis Angel. Note that Seraph of the Sword cannot be combined with Pariah to soak up damage directed at you. This is because such redirected damage is not combat damage per the ability description for Seraph of the Sword... I think.Pariah redirects "combat damage"

"Combat damage is only the damage that is dealt by attacking and blocking creatures as the result of combat. It is not damage dealt by a resolving spell or ability."

Creatures with "Indestructible" can be killed by taking -1/-1 counters that reduce toughness to zero. Also, when an indestructible creature blocks a creature that has trample, trample damage is assigned.