It has recently come to my attention that Beastmasters are not aware that when a monster is unclaimed, it is fair game. If I run past you and you are fighting 4 different monsters 2-3 of which unclaimed, I will gladly take it upon myself to help you out.
Just because you can hold 4 different monsters, it doesn't mean you are entitled to them. If you can't keep them claimed - don't Q_Q.
If this is the provocation you need to sprew 15 different delicious flavours of mad in say or shout, then Beastmaster probably isn't the job for you.
Alternatively - stop taking on 4 mobs and throwing a tantrum when a DD comes along to finish one off for you. We really don't mind helping you out, and will continue to do so - and we appreciate the TH you've applied for us (yours, for a limited time only!)