CD franco
Fleeting time for ult CD reduction .Winter crown for survivability and untargetable ult. Dominance Ice for Lifes bane(Anti-heal). Athena and Antique to compensate for the two magic Items (can be changed depending on the situation).
Common Tank emblem
It gives Franco some room to be aggressive at early game due to the added defense and extra max HP. While the talent "Pull Yourself Together" reduces battle spell and active equipments CD. Which can help as every second off the CD timer can be crucial and game changing.
Battle Spell
A perfect fit for Franco's lack of mobility provides versatility that allows for various hook combinations.
Early Game (0:40-2:00)
You can try to delay the enemy jungler by hooking their buff(try the turtle side first). But be careful as its one of the oldest tricks in books for Franco so they might be expecting it... Or go try to get an early flicker hook on their mid laner for a possible first blood or a battle spell trade.
Best With Cyclops
Cyclops' short cooldown on the 3rd skill can be paired with Franco's hook.
Watch Out For Kadita
Kadita's knock up can cancel Franco's ult.