Just to clear up obvious confusion that still exists out there. Your trophy count and guild rank in LL has no effect on your GC matchup.
This is a direct quote from my IGG rep "In terms of how matches are made, trophies are not considered in the matching process. The matches are decided by Power of the top 5 Heroes from all the participants in Guild Clash and the total number of Guild members participating in Guild Clash."
"Power" includes a number of factors including hero level, glory, skill, evolution, mercenary levels, and total equipment power. On top of this there is a "random" feature that is thrown in to help same guilds from being matched up on consecutive weeks.
The issue with "Power" at this point is there is no discrimination between a WonTon at full glory lvl 200 and pisces vs a Blitz Bomber at full glory lvl 200 and pisces. Hero value is the same at any given similar level/evo/etc. So yes, the system is broken and yes they are working on a way to improve it further.
As for those who are trophy dropping...
The only real reason to drop trophies is to farm mutagen. You drop trophies to get easier battles and potentially more mutagen but in reality when you drop trophies you only lose half the amount that you would gain from a 3 star victory. So you will have to lose 20 battles (potentially 60 star slots for mutagen?) to match the trophies you would gain from winning just 10 3-star battles. Then add on the fact that half of the trophies you dropped from purposely losing are given back to you by others purposely losing and it all becomes very much less than ideal.
Since it is in your favor to win as often as possible the best thing to do would just leave only 1 hero defending your base and not purposely lose offensive attacks. You will still drop trophies from losses but you will gain more mutagen because there should be less people losing purposely against you and you will have more chances to do real attacks.
THERE IS NO REASON TO LOSE ON PURPOSE IN LORDS LEAGUE WHEN ATTACKING.
THERE IS ONLY REASON TO LOSE DEFENSIVELY IN LORDS LEAGUE.
So all of us mutagen farmers lets stop dropping offensively and losing and just start WINNING. Keep those bases unguarded and we'll all profit!
Have a great day everyone!