Kale Berserk should be a floater on this team; she can link very well with [Second Super Saiyan] Super Saiyan Trunks (Teen) in terms of Ki and thanks to her built-in Additional Attack she can cause a lot of damage. Even though the Super PHY element is stacked with good units, I would definitely consider her for that last slot, she is a very solid option.
"Universe Survival Saga"
This team works in a very similar way to "Super Saiyan 3", meaning that pretty much all of the units share at least one link that makes them work very well together in terms of consistency: that link is Tournament of Power and it's really all Kale Berserk needs to fit in. Ideally you would want this unit as a floater, her main purpose is to get in as much damage as possible and she can do that quite well.
Kale Berserk has an immense damage multiplier and a 145% 12 Ki multiplier, very fitting for her role; her Super Attack also lowers the enemy's DEF, but this is not particularly relevant outside specific Dokkan Events.
This unit receives a huge 120% ATK boost at the start of the turn and has a built-in Additional Attack. Built-in Additional Attacks usually have a lower chance to turn into Super Attacks than the ones from the Potential System, but Kale Berserk's has 70% chance to do so.
Both Kale Berserk and SS2 Kefla heavily lack ATK links, but at the very least they don't struggle at all to Super Attack; linked together these two units give each other 9 Ki, making them automatically Super Attack.
Kale Berserk and SS2 Caulifla share so many Ki links that they would be able to automatically Super Attack even without receiving Ki from a Leader Skill; these two units give each other 11 Ki, complete overkill on any team.
Due to her complete lack of ATK links, the best way to maximize Kale Berserk's damage potential is to have her on rotation with a support unit as a floater; this SS2 Kale can accomplish that with her Passive, giving 2 Ki and a 30% boost to ATK and DEF (even though this is actually calculated on top of her 120% Passive and not separetely).
Since Kale Berserk receives from her Passive an Additional Attack that is actually better than the one from the Potential System, it's adives more than ever to invest in Critical. The optimal build is the standard lv.11 Additional and lv.15 Critical.
Should I use Elder Kais/Grand Kais?
Kale Berserk does not have a farmable Super Attack, but she is totally worth 9 Grand Kais/Elder Kais.