I did not really compete in MM due to lack of really good Weapon and tier.
But relogging "buff" stacking is really an exploit, period.
"The Solo Mayhem category is intended for solo hunters. Any attempt at abusing team mechanics or any other Entropia Universe systems or features in order to gain an unfair advantage over other participants will be grounds for disqualification from the event, forfeiture of any prizes, and possible sanctions imposed on one’s Entropia Universe account.
Bypassing or attempting to bypass any of the Solo Mayhem instance entry or item restrictions will be grounds for disqualification from the event, forfeiture of any prizes, and possible sanctions imposed on one’s Entropia Universe account."
Now let's see if MA will stand by their Rules