With your comp there is no reason not to focus the ret and kill him (no matter if it's ret+dps or ret+healer).
If you open hard on ret, he will have to bubble before using any of his cooldowns, if he can't put his cd's up or bubble before sacred shield, you have won the game. If he plays with another melee, just cc and kite the partner.
After bubble wears off, just kill the ret. If the hunter dies meanwhile it does not matter because no melee can kill the feral anyway in 1v1.