guess we have a different view on fun. I found it less stressing, much funnier and warmer to wait for opener (who paid real money) to say go at a chest than having to be attentive on shooting it as in public stuff.
If time is really your issue (which is just a mere seconds), I’m pretty sure you will be a bad candidate for this guild. If you are in such a hurry you probably are one or several of : nearly never taking attention to others/play with ally fire off/greedy yourself, sorry to say. If you can’t take 3 sec to check where are your guildies while the opener say go but can’t stop yourself from running towards chest and hitting it while invul, well… welcome to public dungeons, but it’s not a good attitude imo.