[how do i defeat Florin?]

for some information  i have
Gigalith With the ability sand stream and moveset stealth rock, stone edge, sandstorm and slash and burn
Infernape With the ability iron fist and the moveset overheat aerial ace, calm mind and magma drift
Solrock With the ability Levitate and the moveset cosmic Power psychic, overheat and rock slide

Seviper With the ability infiltrator and move set crunch, coil, night slash and poison Jab
Jolteon With the ability volt absorb and the moveset Thunder, Thunder wave, bite and Return
Lycanroc With the ability tough claws and moveset stealth rock, rock Climb, stone edge and brick break
if you have anny suggestions to improvemen please tell me

[Hardest and easiest gym leaders]

rejuvanation hardest: Florin and Angie
rejuvanation easiest Keta

[how to beat narcissa?]

im not sure how because i havent gotten to that part yet