Raid: G-Line Light Armor level 2 : It was my earliest 450 raid and cost unit. So i kept using it until i got more cost units. I like it because its speedy, its ranged focus, got a dodge roll and the rockets.
General: Rick Dias : I really like this one. I like its array of weaponry that is easy to combo and deal great damage. I often can deal 80k+ and even 100k+ damage on ground and space. The lack of melee damage means i can just focus on ranged damage.
Support: Gundam Ground Type (WR) : Its not my favorite support to use in 300+ rooms, but its simplicity to use and its gun does the job wonderfully.
In higher cost rooms the Heavy gundam is my absolute favorite, because its got a large capacity minigun and a beam cannon. Its playstyle allows me to stick with my team and dish out consistent damage. The beam cannon is a great asset because it can deal pierce damage, so i can still shoot through allies and hit the enemy suit(s) in front.