First, comments on your picks:
- when played correctly, Soraka is a 100% Counter. Her Q has vision, heals faster than he can damage, and E can both be a channel disrupter and can stop him from escaping a bad trade. Also, her ult can screw over his ult 100%.
My advice: if you're having problems with Soraka vs Pyke, be nonconventional and build Armor items like Frozen Heart.
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Morgana's problem with Pyke is much simpler: HE DOES ALL PHYSICAL DAMAGE. All Black shield solves is a pull, and a stun. It does NOTHING to stop the incoming DAMAGE. If Pyke all ins Morg and she misses her Q (really easy with his W and E) He can just destroy her with damage.
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Tank supports are too slow, and you're picking the wrong ones. Alistar can destroy Pyke, but
makes Pyke USELESS if he has a good adc. The ally on hit stun is one of the most guaranteed CCs in the game and Pyke can't really play vs this synergy. If he gets stunned, he's dead.
The best way to deal with lane Pyke is simply overwhelming damage with moderate CC.
keeps him from farming, any gold trinket, generally outtrades him, and can root him and disrupt his mobility dramatically. She can also do so from a safe distance.
Her R is a game changer vs Pyke, and her Q prohibits his direct engagement. Shield is also stronger than his initial damage, so she can basically cancel him out. Her mobility also can be used as a chase tool so he can't slip away.
In lane phase Nami purely owns Pyke. If built correctly she can do so the entire game; keep in mind Pyke generally does damage in melee range, and only has one engagement. Nami disrupts BOTH of those with Q, and her E slows him down so he can't stay close, or in many cases even run away. JUST DON'T GET HOOKED.
Disrupts Pyke's mobility heavily with R. If he tries to run, hes going to get Stasis'd, and come out skill-less.