I did it and took screens, and Id go one by one but found out its over one hundred... so you can check them for yourself if you want to see the progression.
Forums say you can upload 1GB but this much smaller file fails... so heres a link if you want to download:
https://mega.nz/#!NEdDjD6D!wClxGo39DQioe-fUvv9-hF-LfBxdIaPPbCbSKqAiCj4
and it case it gets removed its mega:
/#!NEdDjD6D!wClxGo39DQioe-fUvv9-hF-LfBxdIaPPbCbSKqAiCj4
View attachment 300349
Two routes, if venice doesnt have more firepower than you, you can do your reconquest and grab treviso at the very least, to be able to grab venetia easier next time. You do want sea access, so you can make claims on the rest of venetian land and papal land as well. If you do this then you dont need to even touch anyone else. Easy game AE wise.
If venice is too storng and the ottomans dont wanna attack early. You have Mantua and Lucca, Mantua gives you adjacency to venice and ferrara, this is useful if the pope rivals them and excommunicates them before provence (or you become controller anddo it yourself), Lucca does the same for Florence. So you take full AE on ONE of them, based on whos excommunicated, and do a war to get the border with the pope. You dont need anything else but a border at minimal AE, dont grab everything... Vassalizing MIGHT be cheaper, if so, dont annex, just keep as vassal and use their claims to attack.
Go influence first for AE reduction and diplo rep, hire better relations advisor except when needing a little bit more points to ally austria france or the ottomans, then hire a diplo rep advisor (ottomans is very good for attacking venice as they should always hate each other, hungary might be useful for that reason as well, austria is not good unless they rival/hate your targets but you need their alliance so they dont get much AE from your conquests as you will need 100 relations by the end so you add the land to HRE, france likewise).
To get an important alliance (ottomans mostly) it is ok to do 600 in loans and build lots of mercs, over limit. In order to increase your military strength. But just be sure it will be enough.
When you are capped on AE, if the target is not excommunicated, release nations, you can release aquilea and urbino, i think tirol? you may get lucky and they joi the HRE (although they would join because they are afraid of the non hre guys so they cant be too weakened, unless you can get the ottomans to grab dalmatia).
If no one is excommunicated and venice is strong, sienna might be ok to get the border with the pope.
Use your diplomats to increase relations with all the big guys you may get lucky and they dont want to defend their ally because of good relations.
I took lucca, got controller, excommunicated ferrara, vassalized, keep hitting mantua/sienna for power/prestige/gold, France suicided its stacks so I stopped fighting their war and went on my own, got ottomans and hungary willing to attack venice, the defensive allies were all aroudn me so I took military access to hungarian lands and got out my land before declaring war. venice allied the pope so I got it easy on that regard as both were my targets. Boost relations with coaliton members so they dont join / let a couple years pass while in war. had to drop france and ottomans to ally austria to get to 100 relations so I could add the land to the hre.