Wales Under-18s head coach and Under-20s assistant Nicholas-McLaughlin led Lightning to a third-place finish in last year’s tournament.
She said it had proved a “fantastic experience” for her young squad, with six of her charges going on to make their senior Wales debuts.
“The likes of Nel Metcalfe, Gwennan Hopkins, Sian Jones and Molly Reardon used it as a real launchpad,” she said.
Wales Under-20s attack coach Beck had a more experienced side, with established internationals such as Alex Callender, Natalia John and Sioned Harries in his Thunder squad.
“The chance to test yourself against the best in Wales, Ireland and Scotland is a mouth-watering prospect,” he said.
The squads and fixtures for 2024-2025 will be released in the coming weeks.
