If you encounter a team with a lot of Assassins or shock damage squads, Sivir will most likely leave quickly. With 4 Cat capable of breaking 90% armor will help the remaining generals in the team can fight well when Sivir has "gone away". At this point, Kha'Zix will be the main champion because the squad is of melee nature, he will add the ability to assassinate the back of the enemy team. Should wear for Kha'Zix equipped with Infinity Sword and Blood Sword.
The General of the Sand clan is easy to find, except Kha'Zix for 4 gold. This will be a pretty good second option if you can't find the Ice Hammer or forever see it. With breaking armor from Sand, you still deal enough damage but lack Sodir control. Or you can replace Braum with Janna to activate Wind buff to increase evasion if there are only 3 Kingdoms.
If you have good dignity, you will probably see Lux Kingdom and put her in the squad. Activating enough of the 6 Ice Kingdom buffs (if Sivir has wielded the Ice Hammer) increases the chance of freezing the enemy by 60%. Now you are having a very severe snowstorm with all opponents.
With the way to build the Legion National League squad 9.22 above, you need to be flexible with what human dignity allows. In the worst case, you will still remain in TOP 4 thanks to Sivir.