Fortify vs. Waypoint? (vs. Cannons, Mortar)
IMO, Fortify first is a waste of time and supply and should be saved for the last upgrade always. Generally, I like to go in this order for keeps: Cannons → Walls → Gates → Mortars → WP
King Arcturus X~80 Ranger | Suki Serra~80 Thief | Count Charon~80 Necro | Regulus Leo~80 Ele
HoD since launch
WP is more important. Fortify takes too long and is better last.
If you’re actively keeping a sentry in a keep and a force on the map, then it’s actually a good strategy to rush the WP before even doing walls or doors. ACs and the inner cannons should be enough to easily repel small forces while delaying a larger force.
Ram mastery and cheap golems have very much diminished the willingness of teams to commit to a longer siege with catas or trebs.
I think you see the fortify upgrade done more frequently before WP because it’s the newer woo-hoo WvW players that frequently buy the upgrades, and they don’t know that a fortified keep without a waypoint is much harder to defend than a keep with a waypoint.