This is the zero forma [Saryn] build I like to give to newer players. Nothing too hard to get; [Vitality] + [Rejuvenation] is sufficient for defensive bulk in normal star chart (for the most part). If you do want more healing, her Molt augment can replace [Intensify] (in lieu of Operator arcanes or some other source of healing).

I think [Flow] + [Hunter Adrenaline] feels better than putting efficiency on her. Otherwise, it’s lots of range for spreading spores and just avoiding any negative stats to keep her entire kit relevant. There are definitely improvements available if you want to invest forma or use arcanes, but I don’t think [Saryn] needs them before transitioning to her Prime and investing fully in that. [Saryn]’s just awesome and can devastate normal star chart with little difficulty.

If you decide to go for an endgame build for [Saryn], I have one here