You have the payoff but too few ways to activate it.
Look for Tidecaller Mentor.
Mindwhisker’s repeated surveil helps reach seven graveyard cards so Tidecaller’s enter trigger can bounce a nonland permanent.
Your synergy is already working but you keep falling behind.
Take an early play or answer before another expensive reward.
Threshold checks the current graveyard. Foraging or recurring too many cards can switch off your rewards.
The support is missing
Favor castable creatures and interaction if narrow support does not arrive.