Thread:Linathan/@comment-26947994-20170907015751/@comment-26140304-20170907041406

ES is the only skill that is inactive on the opponent's side; however, SP is still active, making Ilm and Sae a bit more problematic to deal with.

As for extra buffs, Vortex Arena does provide boosts to stats, more so for units with OE+. It's not confirmed on what the buff values are in terms of the boosts that are provided for those units, but it's a really, really huge boost for OE+3 units.