OMG, my first daily quest is fire however I dont have a ready line up for it so i decided to request for a new quest hoping for sneak, snipe or earth quest. And then Boom, LIFE splinter quest.
Honestly speaking, I'm not a fan of Life squad, so completing this DQ is kind of challenging for me. I'm grinding in Silver and seems like the Venari wavesmith and Oshannus are the favorites.
So I have no choice but to combat them. Here's the line up that helped me complete my daily quest and receive my priced rewards.

Core Splinters:

▪️𝘾𝙡𝙖𝙮 𝙂𝙤𝙡𝙚𝙢- Obviously he has 'Void' Ability that's a reduction in Magic damage for himself.
▪️𝘾𝙧𝙮𝙨𝙩𝙖𝙡 𝙒𝙚𝙧𝙚𝙬𝙤𝙡𝙛- Life splinter with 'Silence' ability. Reduction of magic damage on all enemy monsters.

With this combo, venari wavesmith and the gang will have 0 damage to my golem. While Oshannus will only deal 1 magic damage (if he use Alric summoner).
I chose Mother Khala as summoner due to the additional health it gives, making my Golem more tanky for Oshannus' damage.

There's another 1 slot that you can use depends on mana availability. I recommend to place a tanky backline to protect your snipers/rangers. Or simply put an Ooze if there's no Coral wraith in your opponent's pool.

Here's example battle replay vs. Wavesmith and Oshannus.
Life Saver: Epic Battle

Here's my priced DQ rewards: