We Have all been there, Designing a landing page in whatever page builder you use Here are some tips to make sure It loads Lighting Fast.
2 You Should Use Optimized Images.
3 Keep It short. Don't ramble on keep that for other pages.
4 Use A CDN if necessary I personally Would not use a CDN unless the site has over 100 images its just not that effective.
5 USE Cache. I personally use WP Speed of light because of there Site-ground Cache integrations.
6 The less plugins the Better.
Your goal is your TTFB (Time to first byte should be around 500Ms.
I have gotten Mine to .2 By doing the following.
Site-ground Grow Big.
WP Speed Of Light + Addon
Super Cacher Levels 1,2,3 (Any Server Side cache will work)
PHP 7.2 (Newest PHP 10% improvements)
I don't Use A CDN for my site does NOT have enough Images.
Combine CSS,JS,Group JS. (I would Not use WP-Rocket) To Many settings that can get messed up.
Overall Keep it sort and sweet Don't overdo it.
khiibots.com pings with .2ms
And Loads anywhere from 1-3 sec depending on locations and .5 sec after 2nt load.
Lastly, test in 3G 4G LTE does NOT EXIST Everywhere.