Set your plugin to gamble at 275 shards, best way ive found it, or set it to gamble at 100(basically every run after RG) once the community buff goes away, keeping the limit to spend set around 200-250 should be fine. But as it is now like you said, 2 goblins is 630-660 shards, once its back to one goblin itll be 300-360 only. Blizzard didn't really think through the shard cap limit it seems, even with all the people saying it should be higher. Not just because of botters but because you got goblins dropping 600 shards which is more then any person can hold, let alone most people already have 1-300 on them.