As mentioned before, Oner was a jungler who didn't particularly like to GANK early on, and T1's First Blood rate had consistently been at the bottom among the four Top Four teams. So why did pushing for level two in bot lane put pressure on the enemy jungler?
Because Zeus had picked Gangplank.
Gwen versus Gangplank meant starting with Doran's Blade and double Rejuvenation Beads, hard-pushing at level one, then shoving in the third wave to check the jungler's position. Even if the enemy Gangplank last-hit every minion, he still wouldn't have enough gold to recall for Sheen. Gwen, as the one who pushed first and recalled first, could adapt accordingly. If the enemy jungler didn't come, she could save up 800 gold and recall for double Doran's Blades plus a Ruby Crystal, or double Doran's Blades plus Cloth Armor. At that point, Gangplank was already a toy.
Luo Zhen was determined to fight for level two even at the cost of not auto-attacking at level one, all to pressure the enemy and leave their jungler uncertain whether to go top or bot when the third wave arrived.
If he went top to bail Gangplank out, he might get caught in a Counter-Gank by the opposing jungler.
If he went bot, he could most likely bail Lucian-Nami out, but if Gangplank couldn't afford Sheen on his first recall—or died once before getting Sheen—top lane would collapse completely.
Half a year ago, Hong Mi had used this method to put T1 through a painful choice as well.
Half a year later, before Divine Lu Bu had even begun to exert his strength, T1 painfully discovered that Hong Mi had quietly advanced too, becoming the God Zhou Yu of today.
This time, what burned was the human heart.
T1's Inherited Secret Strategy