Well met!

Down below I'll talk about certain card choices, synergies and strategy:

Val'anyr: Good buff targets are Zilliax, Shirvallah, the Tiger for direct healing. Or Immortal Prelate, Da Undatakah and getting multiple Val'anyr. (Remember Immortal Prelate has to die first if you want to get multiple Val'anyr from Da Undatakah)

Da Undatakah: Can go infinite with 3 deathrattles which are from; Immortal Prelate, Sylvanas Windrunner and Sneed's Old Shredder

Zola the Gorgon: With all these value minions almost anything can be a good target to copy. Want to steal a minion with Sylvanas Windrunner and copy "their" minion? Maybe even copy a minion of Sneed's Old Shredder deathrattle?

Zilliax can be combined with Sneed's Old Shredder, or maybe his deathrattle can give another mech to magnetize on.

Know your matchup, count their silence/hex/polymorph/devolve etc. Going infinite with Immortal Prelate combined with Spikeridged Steed can be huge - do not play Immortal Prelate unless you can buff it in the same turn, because if it dies as a 1/3, topdecking it will be extremely bad.