In my opinion, your death in level six because you getting shoot a lot in a room with ammo and machinegun and you went to wrong door in blue corridor. And, in level 8 you hurt a lot by officers in first room. But then in the second try your health only down to 80/90%. But it is just lucky chance that sometimes the enemy will hurt you very bad but sometimes they not hurt you at all (in the level 6 in your death to reset your ammo the guard not hurt you in 2 - 3 shoots (right?) ).
Sorry for my bad english BTW.
Yes I noticed in Level 6 I had some no-register hits when trying to do the reset death.
I'm not quite sure about Level 6 after that...there is no clear for me to remember the correct door in the blue corridor to get the key, and I actually want to use that one nearby with the two medkits behind it, because it heals my wounds generally. I think I just got unfortunate in the wooden area by the other key that both doors were simultaneously filling with guards faster than I could handle. I always sweat that room because of the many doors the enemies can try to come in on me from.
In Level 8, my mistake I'm pretty sure was that I ran into the maze with guards still alive and no guard dead in the door to assure it remains open. Then when I ran in, the door closed at exactly the wrong time and caused me to not have proper cover from anyone I drew attention to.
Here is my general opinion with speeding Episode 4:
(First of all a quick note: Technically, the goal says "in less than the par time", but essentially that ends up equating itself to a speedrun because I want more lives and a faster time = better score, plus the general implication that "under par" more or less implies "using the fastest route".)
E4L1 - Pretty straightforward. Almost all brown guards until the very end. Sometimes I try to run into the elevator without killing those last two officers, but in this case I was too scared they'd kill me before I got in.
E4L2 - SS at the start give a machinegun. Have to worry about long distance shots in the long level-length corridors. Lots of enemies seem to pile up by the key and medkit, plus you can't forget that little SS hideout. SS and Officers in locked door/exit area always a cause for a bit of sweat.
E4L3 - Can't get more than a pistol using the no-secret and from scratch rule. The gold key area can be nerve-wrecking if the Officers are running around too fast or I waste too many pistol shots. The worst (most stressful) area is the room of the normal elevator though. All those enemies in alcoves, long range attacks, and just a pistol. In this case I just decided to try and run into the maze with the secret exit before getting shot to death (and succeeded).
E4L10 - Walk in the park. Just run the most direct path to the elevator. Do it twice (include the time I'm resetting my ammo so that I don't actually lose a life since there's an extra life in the elevator I can pick up, get killed and lose, and then get again the second time through).
E4L4 - Very easy if you know where the elevator is in the checkerboard. With a machinegun from the SS by the key I can kill the SS in the elevator before too many Officers get me. Very short required route for the level too.
E4L5 - That dogs area at the start, especially with the rule making me unable to get the machinegun secret, can be a real pain to knife enough to break through and then shut the door behind me so they don't come in. I use the SS/medkit room and ammo on the opposite side to have enough to fire against the silver key opposition. The island shortly before transitioning to the grey part of the level with the three medkits is a real help. Also I get to use the chaingun for the officers at the end, since it's a mandatory secret for the gold key and I have plenty of ammo. Hard start, plenty of weaponry and ammo by the end.
E4L6 - Usually this isn't too tough overall, but you want to know roughly where the key and locked door in the blue area is, and like I mentioned before you have to be a bit stressful near the second key because there are multiple doors everywhere and no real good cover. The Officer swarm by the end isn't hard because just wait in the prior room and I have good cover.
E4L7 - Can't manage the huge enemy triggering at the start until I get a better weapon (the chaingun I go get is the only one available). Then I just have to run and handle swarms of enemies without them killing me, and get out fast, since the most direct path is very short.
E4L8 - Man does this one make me sweat. There's so many enemies in this! Not to mention I don't get a machinegun until about 30-40% through. At a couple points I use the trick of counting how much I've scored to make sure there are no stragglers. I always do it in the maze at the start with the chicken dinners and the key, and also in the area where I get to kill my first SS for a machinegun. Most of brown weave area is skippable because I can walk with the Officers having their backs to me. Always concerned who's wandering around in the blue areas because there are a lot of deaf Officers and a lot of paths. The last two rooms (including the exit elevator) are the worst though. All those Officers, and then eight SS. Sometimes I feel necessitated to go into the door opposite of the locked one and kill the guards there to free up that room of ammo/health. I think this particular run was the first time I decided to try and go without it. As such the 3:48 I completed the level in is my first time under 4:00, and the par is only 4:30 so that in itself adds even more stress. (And remember I can't take that secret shortcut just outside the red area, because it's not a mandatory secret.)
E4L9 - I always use the trap to get myself killed, just doesn't feel right if I just wake up the one guard and let him shoot me. I consider the safe keys a mandatory secret. Then I go in the ammo room first to get a chaingun and load it up, then rush to the health room and unload it all on Otto. Episode finished!
Here's the pars I'd set for what it's worth:
E4L1 level par is 2:00, my IaDI from scratch speedrun par would be 1:15.
E4L2 level par is 2:00, my IaDI from scratch speedrun par would be 1:30.
E4L3 level par is 1:30 and I'd say that's good for an IaDI from scratch speedrun using the secret exit.
E4L4 level par is 1:00, mine would be 0:35.
E4L5 level par is 4:30, mine would be 3:00.
E4L6 level par is 3:30, mine would be 3:00.
E4L7 level par is 2:00, mine would be 1:15.
E4L8 level par is 4:30, mine (without using shortcut secret) would be basically the same. Tight par.
Whole episode par of mine speeding and using thread rules would be 15:00, I managed almost two minutes faster but that was my third run. 15:00 is was what I got on my first run which I didn't video.
I guess my pars aren't really pars (in most cases) but rather should be looked at as "time to beat", per se.