Hi Raul! I've been running a game for about 6 weeks using 4e. I'm using the Character Sheet by Wes, with power macros built via this tool:
http://4e-power-builder.s3-website-us-east-1.amazonaws.com/
I haven't found any API scripts to use with 4e yet, but I'm looking.
Here are my macros:
These macros are built using the information on the following page:
https://wiki.roll20.net/DnD4e_Character_Sheet
They’re built with guidance from this page:
https://wiki.roll20.net/Dungeons_and_Dragons_4th_Edition
Some of the values are based on character sheet values, except for all of the Atk variants and Init, which are values I manually added onto monster character sheets.
The request defenses will work without manually adding values. Just make sure to assign a token to a sheet, then after clicking on the macro, click on the target token and it will display defenses.
Monster actions
I changed all the attacks to have damage removed. I also replaced /emas with /w gm
So no one could see my prep.
Attack-ac
/emas @{selected|token_name} rolls [[1d20+@{selected|Atk}]] to hit vs @{target|token_name}'s Armor Class [[@{target|ac}]] and deals [[@{selected|Dmg}]] damage.
Attack-fort
/emas @{selected|token_name} rolls [[1d20+@{selected|Atkf}]] to hit vs @{target|token_name}'s Fortitude [[@{target|fort}]] and deals [[@{selected|Dmg}]] damage.
Attack-ref
/emas @{selected|token_name} rolls [[1d20+@{selected|Atkr}]] to hit vs @{target|token_name}'s Reflex [[@{target|ref}]] and deals [[@{selected|Dmg}]] damage.
Attack-will
/emas @{selected|token_name} rolls [[1d20+@{selected|Atkw}]] to hit vs @{target|token_name}'s Will [[@{target|will}]] and deals [[@{selected|Dmg}]] damage.
Monster-Initiative
/emas @{selected|token_name} rolls [[1d20+@{selected|Init} &{tracker}]]
Monster-damage
/emas @{selected|token_name} rolls [[@{selected|Dmg}]]
Request-defenses
/emas The Dungeon Master checks @{target|token_name} defenses: Fortitude [[@{target|fort}]] Reflex [[@{target|ref}]] Will [[@{target|will}]] and Armor Class [[@{target|ac}]]
Saving-throw
[[1d20cs>[[10 - (?{Bonus|0}) ]]cf<[[ 9 - (?{Bonus|0}) ]] + (?{Bonus|0})]]
All of my adventures have been custom so far. I've been adding monsters as needed, but I really wish I had an API script that could import old DDI monster files from the Adventure Tools or elsewhere. If anyone has any suggestions, I'd be glad to hear them.