Now I could understand why they would have kicked you if they needed a second bubble. But since they already had 2 I don't see why they got rid of you. It's easier to oryx with 2 bubbles but you can do it with 1. I know when I run a group I always make sure we have a minimum of 2 titans and 1 hunter. It just makes the raid go 10 times faster. Hell I would have put you to could use at golgoroth and had you use melting point right at the start of our dps because its better than a tether. But due to the fact that this had already happened to you once now. You should probably level up your defender imo. It could hold you out of groups later on from what you have already seen. But in the end its your decision if you want to spend the time (or money) to level it up