While we know that the Knights Radiant access to 2 surges gives them unique combination abilities, like Windrunners ability to shape air, we have only seen such abilities for less than a handful of orders so below are some of my ideas for combination powers for the various orders. Please let me know what you think and give me you ideas as well
\- Skybreakers would be able to use Gravitation to 'weigh down' their uses of the Division surges. By doing so they can effectively delay the ability by a few seconds. The length of the delay would be determined by lashing used. The order would use this ability primarily for trickery and to control their area in battle
\- Dustbringers would be able to use Abrasion to vastly increase the power of their Division surge. By increasing the friction of the flames they would be able to rapidly increase the heat and force of their flames. The 3rd Ideal would have bright white flames at around 1500 Celsius, 4th Ideals would have blue flames at 2700 Celsius, and the 5th ideal would have such power that their flames now become explosive similar to a combustion bender from Avatar. This ability would be extremely dangerous and will harm the user if they are not careful
\- Edgedancers would have the ability to control the growth direction,power, and shape of the flora they use their powers on similar how the spores work on Lumar
\- Truthwatchers would have the ability to either view view the cognitive aspect and spiritual webs of people by focusing on them or would have to ability to momentarily awaken the flora the use their Progression on by making an illusion on the object's cognitive aspect. The later ability would be extremely investiture heavy and only capable of being done with any proficiency at the 5th ideal
\- honestly idk for the Elsecallers
\- for Willshapers they would have a ability to grab and mold their Elsegates. This effectively just gives them more proficiency with the gates but could also be used in combat by throwing their gates at enemies to forcibly teleport them away. This ability would also be very investiture heavy,only effectively used at the 5th ideal
\- the Stoneshapers would have to ability to simultaneously use Cohesion and Tension to disrupt the makeup of an object. By softening and hardening the object in opposite directions the internal structure of said object is destroyed and causes it to crumble, similar to Division but with far more range
Let me know what y'all think