So during the start of a round, you should always have your sentry nest near there, and not three points back. It is worth noting that BLU's spawn is directly outside the First Capture Point so it won't take them long to get there.







The very first thing I wanna get out of the way is do not go anywhere closer than the Blu spawn exit on the left, a thing I see too many new egineers do is go behind there. The reason to not go there is becasue its proximity to the Blu exiting of thier spawn, it will take one Uber to clean it all up, a few nasty demos and spies are right near it.


Where my crosshair is, above that is a big no no. The reason is because flanks, coming around that building, inclosed space, so spies will spam that area, again, because of inclosed space, demos and Ubercharges will stam roll through that area.

Do not go in near the tunnel. Just don't.

Moving on to second point.

Okay. You could not hold the first point. Your team is pushed back. The second point in my opinion is the most crucial point to hold. As the procceding points are in relativly close proximity to eachother.
With anything in this section, ALWAYS remember the side flank route.




Like I said with the First Capture Point, don't go in the mines as it is way too of an inclosed area, demos will have a field day. The second part of where-not-to-go in my opinion is anyhwere (referring to the image opposite) on the right side where the snipers usaully stand. I would ot reccomend going below the ledge of above the ledge as snipers will simply shoot at it whilist you continually hit your buildings weather you end up getting killed by the sniper or whilist you are distracted, a spy backstabs you.







As seen in the image opposite, a sniper can
safely shoot your buildings without being hit.

Okay to be honest, if the enemy team has the capabilties of advancing to the second as well as capturing the point, in my opinion, the third pont is unfriednly due to again, snipers, and enviromental as well as building locations make it hard to have a 'good' spot in general.



I know I said above that the third point is bad (O.P.I.N.O.N), but a rather really bad spot that a lot of engineer go to is,



Where i'm standing currenly to take that image, that 'ledge' is a common, but bad spot due to, snipers, demos and the large operating range for spies, and simply random fire from enemy can make this spot a sitting duck for the enemy team.


Moving on...

Okay, BLU is on the verge of advancing to the final point, will your descison of a sentry spot affect the team? Will your chosen spot be good to hold the victory. Or will that spot simply fail, and your team will lose...





As the picture of the fourth point are is rather large, i'm going to do a more in depth view of this point as it is the final point before BLU secures victory. The first spot that is a no no, is in my opinion, it where, on the image below, the large 'D' sign is imprinted on the wall, the reason that this spot is bad is that it is a easy target for snipers, as shown in the fist image above image, take note that where the sniper will likely be standing is also where the other classes will be coming from, unless they flank.






It is also worth noting that in the image below there is a flank route to it, so spies could enter, demos hiding around the corner could bounce grenades at your buildings.




The second spot which is not common, but worth pointing out, is where the sentry is below for the reasons of, flankers, hideing around the corner demos' bascislly the same reasons as the first bad sentry spot. ( If your confused to where this is, look at the second picture; directly opposite from that.





The final spot is somewhat-common, is a bad spot because of it being so open, you are opening your sentry to way too many sreas of getting hit, snipers, spies are unlikely, anything that comes in that undergrond flank is also a threat.

Okay everything you have read above, major diclaimer incoming, THESE MAY NOT WORK, DO NOT RIGHT IN THE COMMENTS COMPLAING HOW THEY WORK FOR YOU BECAUSE THIS IS MY OPINION, I RESPECT YOURS.

With that out of the way, judging by your teams effort, how good BLU is, and if you diden't put your sentry in those listed spots, you should have secured victory! Thank you so much for reading this guide, it took me almost 3 hours to make, hope you defeat BLU (no one really likes them anyway, they are kinda the Hufflepuff of TF2 xD), and remember, have fun with engineer. Goodbye!