I don't believe there is any practical solution to this issue, and I can't think of another way to seed teams for the GST. People suck and abuse the system.
It's the same reason why the singles leaderboard had to be changed. I'd love for it to be that old leaderboard we had, but unfortunately that's way too easy to manipulate and there's no automated means to control it.
Even the "good" guilds resort to certain tactics. I personally hate sparring for #1 every season now:
- I feel it provides no actual advantage anymore
- I am competing against guilds that have achieved their score in the lamest way possible
- I am having to brainlessly spar 5 vs. 2 against noobs 100+ times to actually achieve a high score, not by selection, but because the better guilds will use alternate tags and the boosting guilds will avoid you