Monster Hunter Freedom Unite

How do I do the 7* Elder Urgent Quest!?

I'm having trouble with killing the dual monoblos... I time out trying to kill the white one with no damage to the normal one...

I haven't got very far in the Guild, 2*. I lie SnS but I know i'm not going to be able to use it so I'm pretty much open to suggestions.

What weapons are you using? Have you been to the Guild Hall yet, if so, which HR are you? Which weapon type(s) are you trying?

Monoblos are weak to thunder, but if you're using Greatswords or Hammers, you want the highest Raw damage you can get.

As Horned Wyverns they can get stuck in certain walls which can make it much easier to get hits on their weak spots. Examples are ledges you can climb onto in Areas 3 and 9 in the desert and the central pillar in Area 7, which is a very common place to trap them, by hiding behind it and waiting until they charge into it, then running out and hitting them.

If you can reach it, Monoblos will take the most damage from a cutting weapon to the tail, then the wings, then the neck. With a blunt weapon, try for Neck, tail, wings, with the neck being the most effective. Solid hits in any of those spots will do some serious damage.

Keep in mind 7* quests are equivalent to High Rank Guild quests (6* and above, or HR4 and above) so you may want to go into the Guild hall and get up to Hunter Rank 4 or 5 to get gear from things you're otherwise unable to hunt yet.

Just to add with the answerer's answer---------- ---------- Monoblos is a fast digging wyvern which is faster than diablos that is why it is really irritating if you don't unsheathe your weapon yet, and still get hit if you aren't running.
Monoblos is a smarter wyvern than diablos, which has a lower chance of getting stuck with these walls if they got stuck in the wall in the same area again, which instead of a dumb charge, he will just dig or do a charge with a lift on the horn. I did it with a GS and done it in 45 mins. on my first try. I didn't had a hard time on this because I got mega juices, some flash bombs if he is raged then the other appears, and some luck if you are rally a good player.

You could use a Thunder SnS, but it's going to be difficult. You'd need to attack the legs very consistently to bring the Diablos down, then go for the tail, since you can't reach it any other time. I'd also recommend trying to learn how to hit a charging Blos by standing just outside its wings, but that's not the easiest tactic.

The other really useful thing I forgot is if you Sonic Bomb the Area where a blos just dug down into the ground, you should shock them back up like they're in a pitfall Trap for a bunch of free hits, so Sonic Bombs plus the ingredients for spares may be the answer, then hit it with everything you've got. If the SnS doesn't do the job with that tactic, using Sonic Bombs to get some Hammer Triple Pounds or Level 3 GS charges should do it.