KC at FL300 at 300kt on an out and return route to a fix.
Two F16s also FL300 at 450kts.
Were those speeds KCAS or KTAS? 300 KTAS at FL300 in ISA is only a ridiculous 188 KCAS - whereas 450 KCAS at FL300 is M1.13...
Also the tanker and receivers should NEVER be at the same level until the receivers call visual. Declaring MARSA when co-alt and BVR is a recipe for disaster.