I would recommend diamond pushups or dips for the 3rd way (pressing down), standing overhead dumbell or barbell extensions for the 1st way, and skullcrushers for the 2nd way.

Kostas

In that case, standing pushdowns are out. You could do standing dumbbell extensions to hit the long head. Barbell skullcrushers , barbell close grip press, and reverse grip presses. DB tricep kickbacks get a bad rap but in your case with limited options you could use them as a finisher.

As you have 2 incline chest movements I presume you think your upper chest is lagging? If so try doing an incline movement first then go flat/decline then back to an incline. I like the shoulder routine, pleased you have a posterior deltoid exercise in there. Just remember to execute very clean form on the bent over raises and squeeze your posterior deltoid throughout the movement. Also with your rep ranges dont be afraid to work up to 20 rep sets from time to time as this will beneficial.

I seem to have trouble whenever I do barbell skullcrushers, it causes a lot of stess on my elbows and I end up doing improper form. How do I remedy this?

 

Try dumbell skullcrushers, with the dumbells facing the ceiling. Also check this out man :

https://www.youtube.com/watch?v=BwcEZ97WRik


Kostas