I made a Parshath Deck recently, so I had an idea for a Link Monster for them, which may seem odd, but they do have the option for a Synchro Monster, Pendulum Monsters if you want to use Guiding Ariadne and also this can easily be brought out with Rebirth of Parshath. Of course you can go the regular route of using 2 Level 5 or higher LIGHT Fairy monsters. What this gives you is the ability to Special Summon monsters from your hand or GY when you activate a Counter Trap Card, to negate effects that target cards you control, which helps Sacred Arch-Airknight Parshath to easily be Special Summoned, and also protects other Parshath monsters you control from battle and effects. It does so with a 2500 body, which can easily become 2800 with The Sanctum of Parshath, which combos well with this card since it can banish it from the field or GY as well.
2 Level 5 or higher LIGHT Fairy monsters
Once per turn, if you activate a Counter Trap Card (except during the Damage Step): You can Special Summon 1 LIGHT Fairy monster from your hand or GY to your zone this card points to. When your opponent activates a card or effect that targets a card(s) you control (Quick Effect): You can banish 1 “Sanctuary in the Sky” from your hand, field or GY; negate the activation, and if you do, destroy that card. Other “Parshath” monsters you control cannot be destroyed by battle or card effects.