The current Scarlet Spear, you don't get a bonus if you don't reach 100/100 Murex completed. The Fortilla instances that have low amounts of players cannot complete the 100/100 Murex and don't get the bonus. WHY? Do the same sh*t as everyone else, do the same grind as everyone else, get rewarded less because you got unlucky and joined a bad Fortilla?
Just make it into one big Murex goal per wave. And if the goal is completed, everyone who participated that wave will get the extra scarlet cr