I go really simple.
Level 1: Haste potions, Pendant of Time.
Level 4: Carnifex (even if not a melee)
Level 5: Chrono set, False Life 20 amulet, Voice, Mantle (I carry both all the time and permawear one. This life I intend to farm more Mantles so I can make augments to replace these - I'll still wear Voice 5 to 19, but at 20 will put on Epic Kundarak Delving Boots with the augment and at 25 will hotswap EKDB and tier 3 Halcyon Boots; I might also make a level 1 XP item now that we spend more time from 1 to 4).
Level 9: Mroranon belt (first time I bother with fortification usually). Grab SOS from bank. +6 Con ring.
Level 11: Greensteel accessories
Level 14: Cloudburst (/drool at how good this is levelling now)
Level 20: Old epic gear
Level 25: Epic Gianthold gear
Other than that I don't really change things much. I used to spend more time on getting the 'perfect' gear at each level, but then I realised I was spending more time on character maintenance than I saved by doing quests slightly faster.