After seeing this post, I decided to do some testing on this of my own.
Before anyone bothers to criticize it, yes, I am a hacker. Yes, I like hacker. Yes, I use the Hacker tree almost exclusively. No, that doesn't affect my testing of the ability in question, namely, Code Infection 4.0. (in honesty, I don't use Code Infection 4, but instead favor 3.)
Here is what I have come up with.
For the first wave of testing, I told MrCyborg to hit me with a Code Infection 4.0 while using the Power Tactic and Overclock. It should be noted that MrCyborg does NOT have max Belief, in fact, I am unsure of what his Belief stat actually is, but I know it is not max. For this first pass of testing, I am wearing 0 Viral Resistance. Here are the results.

The first 6 ticks are affected by Overclock, and are doing 223 damage per tick to me. After Overclock wears out, the damage drops to 129 per tick. This is with 0 Viral Resistance, and without using Insidious Code or any other debuffs as I saw you used in your screenshot Krytical.
For the second testing pass, I put on my Viral Resistance outfit, which gives me a total of 225 Viral Resistance. Not too shabby. Here is how the damage was affected:

This is without Overclock. Unfortunately, I can't seem to locate any screens of when we used Overclock. However, you can see that where I was normally taking 129 damage per tick, I am now only taking 69 per tick. That is quite a drop.
For the last testing pass we did, it was decided that I would use my Code Infection 4.0 on MrCyborg, because I actually do have 30 Belief. In this pass, MrCyborg is wearing 0 Viral Resistance, and I am using Power Tactic as well as Overclock. Here are the results:

For the first damage tick, I was in Speed Tactic, and this is before I activated Overclock, so only 142 that tick.
For the second tick I am now in Power Tactic and using Overclock. My damage is now 299 per tick.
On the last two ticks my Overclock has run out (I am still using Power Tactic), and my damage is 170 per tick.
In summary, I don't really think this is overpowered. Damage Resistance plays an important part in how much damage you take, and if you choose not to protect yourself against certain types of damage then you should take large amounts of damage from them. If damage overall is going to receive a nerf, then damage resistance needs to have a much smaller affect than it does currently.