Your rats may have some more dice. Not sure how you get to -7... I'm guessing you counted -4 flashpak, -2 positioning and -1 reach?
- They get +3 for 'Friends in melee'
- Positioning apparently only adds dice to my own attacks but doesn't decrease their attacks or improve my defense (weird, imo...)
- Reach I'm not sure, it says "+1 per point of net reach"; so I'm not sure that it becomes a -1 if you reach is negative...
- They might get a +2 or +3 for charging too.
Not that I'm complaining! You decide what to do with it.
Rules thing: Rafa will drop his rifle (it's on a sling, so it'll just hang), go full defense and throw in the Throw maneuver (pun intended). Would the maneuver cancel his Full Defense?
If not, he'll use it against the 1st rat and throw it towards the rest that's racing towards him, hoping to maybe trip some of them to slow their approach and deal with them one/two at a time.
If it does cancel his Full Defense, he'll use it against the 3rd rat and try to toss it towards the 4th.
Rafa's Full Defense (Block): Rea 6 + 2xUnarmed 6 + Spec 2 = 20
Full Defense 1 (20d6.hits(5)=6) First one misses. (Unless you add dice and roll incredibly good.)
Full Defense 2 (19d6.hits(5)=6) Second one misses. (Unless you add dice and roll very good.)
Full Defense 23 (18d6.hits(5)=8) Third one misses. (Unless you add dice and spend edge.)
Full Defense 4 (17d6.hits(5)=5) Fourth misses. (...)
Defense if fourth reaches him and full defense is cancelled. (Skill 6 + Rea 6 + Spec 2 - 3) (11d6.hits(5)=3)Rafa's throw attack: Strength + Unarmed Combat Opposed Test (Arsenal p160 for full effect) -->
Str 9 + Unarmed 6 + Spec 2 + Position 2 + Reach 1 (20d6.hits(5)=12) Holy cr@p!Edit: In case you want a Throwing roll to see how well Rafa aims with his Rat-Tossing-Attack:
Throwing: Agi 8 - Defaulting 1 (7d6.hits(5)=0) Rofl... critglitch. Guess I'll hope you don't need a Throwing roll

In my defense: it's not called for anywhere in the book! :p (If the previous roll grants me some bonus edge for critical success, I promise I'll spend it to negate!)
Will throw some soak dice just in case they're needed:
Body 6 + Impact Armor 12 + Bone Density 2 (20d6.hits(5)=4, 20d6.hits(5)=8, 20d6.hits(5)=5, 20d6.hits(5)=9)-- Sorry for the load of dice, just been so long since I got to roll, I'm getting all I can out of it! --
Feel free to narrate, otherwise I'll be more than happy to do so myself!