Hmm... you want to achieve a lot of things. You might end up frustrated as you gimp yourself in the process. Why did I say that?
1. Reflect Damage 3. 10% difference is a lot. In case you receive a solid 10k damage, you'll reflect over an AoE with 3k vs 4k with levels 3 and 5, respectively. Imagine you were able to withstand 3 10k damages or even a single 30k. You might have lost 30k off your HP but you have successfully dished 12k(L5) vs 9k(L3). What does it take? Well... you only have to activate it and stand in the middle of a crowd, taking damage. If you are the Banding type and is currently banded to another RG, most likely the two of you will be rammed by a lot of AoE attacks. Again, that's a plus as reflected damages via RD stack as the number of RGs affected increases making their attacks serve as poisons to their own kin.
2. Shield Press 3. As far as I remember, the success rate has been nerfed to have a maximum of 70% at level 5. A sure stun will most likely end up a win move since the duration is long. So like the other build I proposed, you don't want its stun to fail, yes?
3. Moon Slasher. To be able harness its power, you need it maxed out. Although it is a must that you have your casting taken care off as it is interruptible. It simply means that you have to acquire a good value from your DEX and INT to which hybrids lack due to their stats spread to almost every dept. Besides, this is also a good skill when you're about to flee and badly needing a skill to slow your oppressors.
Notice that I have mostly tackled the defensive areas. You really have to choose on what you'll focus on. As for EB, I do hope you're not onto something fishy with it. I'd be completely straight, I, together with the others have already mentioned that the difference between 1 and 5 is minimal. It is supposed to be prepared before entering a fight. And obviously, reserved until the right time comes. I'm also seeing an absence in Vanguard Force. Inspiration is not a very reliable buff even though its effects are astounding.
Edit... By the way, Banding has this status called Overawe that drastically slows enemy movement. Its duration increases with its level. Keeping that in mind, you and the rest of the Band transforms into a mobile Quagmire to those, trying to penetrate the formation and go straight to your Warlocks and whatnot.