Well, personally just to make sure you should try 2 units with 6 rogues. This way, even if you lose one of them, you still have another for round two.
But here I would take a different approach. I would use 2 Rockets and 6 Rogues. I would do this.
On Wave 1, you should get rushed. I would not panic, as you need them to turn your rogues for you. Once it is your Turn, I would take out their Rockets, UNLESS they already went. If they already have GONE, I would take out the troops rushing you. I would move around and try to stay out of their range. But this is trial and error for you. The rockets are pretty deadly in this case, so make sure you hit what's coming at you, UNLESS you have troops NOT turned. If you have troops NOT turned, I would move them up one or two squares to entice a hit. YES, you can bait them into hitting you. That's the trick in taking away a hit from them. Remember the rogues are key, as they absorb the hits for you.
Ok, Wave 2: Does not matter what you have left, as long as you have 1 Rocket and 5 rogues you can still win easily.
The rockets are good against the tanks (they have a bonus against them), so do this.
The game will probably alternate your rockets to rockets, as they are the same units. Meaning they will go, then you go.
How I use to and still do is NOT hit the first one that goes for them, BUT the second one. This way, I get a second shot in on them and POOF, they are gone. So, let the first one hit you and it should turn a rogue for you. Then you just pick off the Rockets and Heavy's coming your way, while you back up and stick to the corners. That's an easy winner for you, honestly. Try that and you will get the hang of fighting with the Rockets, they are pretty nice and good in PME Age. I hate when people say this is too powerful for such and such, when they just don't understand how a troops works. All units from each age are different and some are better than others. That's the game and it is all about choosing what works best for what you are fighting against.
Good Luck and if you need anything, mail me and I am happy to help you.
Oh, if you can't seem to get past it, remember, you can always use your tavern silver to give you a better boost. Hehe.
Steve - LordStevie