After some private discussions I think I need to clarify a statement I made more.
It does not really addressing routing. The examples show that you can bundle your planes together to waypoint X. Heck you could bundle them together to the target A and just say bomber force B and escort B push on past and hit target 2. Of course routing them right through a battle runs the risk of losing some of your bombers and disrupting the cohesion of the group to hit base 2, which is why I tend to like skirt around the battle and send escorts in first to pin down an enemy defenders to a certain location so that I can then try to route people past them to where ever they are going.
What do I mean by push past here? When I say push past basically it that you encounter an enemy and instead of engaging push past them. You can do this several ways.
First way to avoid the enemy altogether and set a way point at a safe distance from target 1 and have your force B break off there. Usually it is best to be about 25 miles or more out from target 1 for this type of routing or tactic. At 50 miles out you probably won't run into the enemy yet or it you do it is just pickets. So you don't yet have to fear an out and out attack on your bombers. At 25 miles out you most likely will encounter the enemy in force. This is because if the defender engages you at any closer range they really don't have a chance of stopping your attack force. Especially if you are in JABOs .. you let JABOs get within 12 miles uncontested and with alt you won't be able to stop them from diving on your base and dropping ordinance. Well unless they are slow JABOs .. say B5Ns.
Instead of setting a way point you can push past, breaking your force in two when contact with the defenders in force occurs. However, if you go this route you need to setup your forces correctly.
Basically you need to have escort A run a forward screen far enough ahead of your bombers that they can't see visually see them and be out another say 3 minutes or so from there. Then you have escort B provide close escort to bomber A and bomber B. Once escort A encounters the defenders they report it and do their best to engage the defenders and pin them in place so they can't see the bombers.
Bomber force A, Bomber force B, and Escort B then wheels in the direction toward the second target. In effect they try to skirt around the battle area unseen of flank it. Then at a reasonable moment bomber force A breaks back toward target 1 and starts their run. Meanwhile bomber force B and escort B push past and on toward target 2. They also end up providing a rear screen to the bombers then running toward target 1. Since defenders coming toward the tail side of bomber force 1 will encounter force B heading in another direction.
Actually running force B over the actual target 1 runs quite a few risks that impact whether they will even get to target 2 or not. Basically it subjects them to attack, can disrupt their cohesion, expend their ammo, use up WEP, etc. Resulting in them being beat up, not well organized, possibly at an alt disadvantage when they encounter the defenders at target 2.
Also it gives your opponent information on you. Defenders will broadcast the your numbers, make up, and direction to others. So if you route a second force actually over base the defenders will go .. hey target 1 is being hit. But X many bombers flew past toward the NW without dropping bombs. Which an astute CiC will go .. aha .. they are on their way somewhere else. What base could they being going after? Hmm, this base is 50 miles away I will tell my defenders to move to point X and get ready to jump them.
Now if the defenders don't see you then they can't report you and vector in other people or prepare positions.
Now lets say you don't bundle two forces together and have them split off at way point X or at first significant enemy contact. Say you only have one force. Many CiCs like to go with say a ratio of 1 escort pilot per 2 bomber pilots. Figuring that the bombers will suffer casualties but their numbers guarantee some will get through. Personally I am not a proponent of this strategy.
Lets say you have a force of 21 pilots. This strategy calls for 7 escort pilots and 14 bomber pilots. If formations are in use lets say 9 and 12 since 12 bomber pilots is 36 buffs. Here you are saying that 9 escort pilots and the the number of bombers you have should guarantee you get some ordinance to target.
The problem I have with this strategy is that to be effective the escorts have to fly close escort. So again when the defenders find you they find you and the buffs and can pick when they attack your buffs. Also your buffs are under attack which can severely disrupt their runs. They might not die but since they are under attack their bomb drops might be off resulting in a poor bomb damage rate.
If you go the other way 14 escorts and 7 bomber pilots you now have other options. You can break your escorts into two groups. 7 for close escort and 7 for a forward screen. If no formations in that FSO design then you have 1 to 1 close escort protection on the buffs. While you have 7 forward guys trying to disrupt the enemy before they see your buffs and organize for slashing attacks. Seven fighters can completely destroy the cohesion of the defenders if they forget their job is to find and kill buffs.
If formations are on then you have 7 forward / screen escorts, 7 close escorts and 21 bombers.
With or without formations you have an effective forward screen that is to engage enemy forces before they see the buffs. As soon as contact is made the buffs then can wheel with their close escorts avoid the battle and push past it to target (skirting around it) so they can try to get unmolested runs on the base which should approve their bomb damage rate and also expose them to less concentrated attacks. The close escorts are around just in case some defenders come across them now that weren't engage in the forward screen. You could also change your forward to close escort ration. Say 9 forward and 5 close escort now.
Most FSO are designed to reflect that anything with bombers realistically has two main goals. Keep the bombers alive so that they can get bombs on target. A dead buff not only costs you the point for that buff but also robs you of the potential for scoring points with ordinance.