How Do I Build This? (Graviton Pulse Field/Graviton Surge)

[DoctorJerk]

I have a character capable of transforming into something like an eldritch abomination and I'd like to give it a power characteristic of such creatures. My first thought was to have it create black holes, which is not only tactically stupid and irresponsible, but prohibitively expensive to do, even small ones. So rather than create a permanent hazard that might destroy the planet, manipulating the (theoretical) force carrier particle of gravity on a smaller scale might be more reasonable.

Here's what I have so far:
Crushing Attack (2) [Graviton Pulse Field] (Area Effect (16 yd); Cosmic: Irresistible attack; No Blunt Trauma; No Wounding; Double Knockback, (Feature: Reversed Knockback +20%); Elemental: Gravity; Partial Dice (+2); Persistent; Rapid Fire (+10); Very Rapid Fire) [93]

Here's what I think it does, and what I'd like it to do:
The user specifies an area (+4 to hit) and makes an attack roll. If successfully landing all 10 very rapid fire shots, that one hex is the origin point for a 2d crushing implosive force that repeats over the next 10 seconds, 10 times per second, each set of ticks occurring in the same effective instant, in a 16 yd radius. On a minimum damage roll of 2cr+2cr, victims are subject to a total of 40cr damage (No wounding or blunt trauma) in one second.

Here's what I'm uncertain about:

1) Should the crushing damage be summed before knockback is calculated, or for each tick separately? My hope is that it should be summed before knockback since all ticks in each second occur simultaneously for all practical purposes, thanks to the Very Rapid Fire enhancement (Powers P.105). Otherwise, the ability is virtually useless against enemies with a strength higher than 12 on the very best possible damage roll, unless they're standing in a room full of unreasonably sharp knickknacks. My logic is that if you were hit over every square inch of your body with the force of a hard-chucked basketball, it might not move you, but it'd certainly give you a noticeable kick. However, if you were hit with the same force 10 times in the very same instant, its not unreasonable to say that all those forces would add together into one big shove.

2) Does this ability even need the Cosmic: Irresistible Attack enhancement (Powers, P.128)? Could the Elemental limitation cover the desired behavior? The only property I think this version of Cosmic contributes, is the RAW ability for the effect to ignore walls and cover as an obstruction, but I'd be sending it around enemy cover anyway and hitting potential allies behind walls I can't see through is undesirable. Besides, it doesn't actually need to penetrate enemy damage resistance, even cosmic DR, since the goal of the attack is to shove everything in its area of effect towards the center and cause damage through collisions and debris impacts. Perhaps, since the attack is based on the idea of manipulating gravitons, which wouldn't care about walls anyway, would this attack pass through walls without this version of Cosmic? I mean, I want enemies to be able to counter this with anti-gravity tech or abilities, but since those abilities don't seem to require taking a Cosmic enhancement or modifier to have, I don't see why this one should, if it can be countered by non-Cosmic measures.

3) Does the Very Rapid Fire enhancement remove one's ability to determine how many shots to fire? I couldn't get an explicit read on how this enhancement is intended to work. Given that it's an enhancement, I'm thinking it still lets the user choose to fire any amount of shots up to RoF, but all shots happen together, almost instantly. I'm hoping you can still choose how many shots to fire, so this ability can be adjustable in strength.

4) If an enemy is in the center of the area of effect and pressed against another object being affected by this attack, should they take collision damage based on how fast each object would have been moving toward each other? Basically, the victims are being mashed together by a powerful force, surely that should produce a damaging effect.

As far as whether damage should be summed, I found a discussion about a character making multiple attacks, but nothing specifically about the Very Rapid Fire enhancement being taken into account. However, I think the thread indirectly makes a case for summing the damage before calculating knockback: http://forums.sjgames.com/showthread.php?t=87960

Annoyingly, I could find nothing regarding how to build implosion attacks in the books, but I did find a Kromm post regarding the price for reversing the direction of knockback that I found very reasonable: http://forums.sjgames.com/showpost.p...74&postcount=8

So, this all describes a graviton pulse effect that someone can escape if they moved out of the AoE between pulses or passed through within less than a second. How would you model it if you wanted to create an attack that produced a continuous gravitational pull towards a central location, something you'd have to try to resist even if passing through for only a moment? e.g Zarya's Graviton Surge ability from Overwatch