All you will need are at least 2 close combat hunters, one long range hunter and you to be mounting that monster as much as possible. You should be able to handle almost anything. I use the Charge Blade and gone through solo and went through HR7 alone. I assure you that if you need help update your armor, learn your monster, don't go crazy and die all the time, make sure you have good items to sustain yourself, and really make sure you be patient. you should be able to kill these monsters in less than 40 min alone.