In platinum there are quite a few double eggs, but after that it’s generally one per step that you need for the next step. Unless you do two steps in one go (say Sekhem and Scorchill), but that requires some serious token saving prep too.
(edit: conversely, you can save some timers if you look ahead in your path and see how quickly you need the dragons. If you follow icicle 1, for example, and only breed Sekhem in the first step, there’s no need to speed up his hatching. You’ll need time to level up Scorchill anyway, so might as well let it hatch naturally and level them up together)
Leveling will still be somewhat tough. At level 108, leveling Sekhem without elite takes 57 days with just multipliers (green research, Kayla, no runes).You’d need to do 16 runs per day if you want to get him breedable in 28 days. If you’re level 126 it’s easier, just 7 runs per day will do it in one event then.
I much prefer to pay 42 euro’s a year and not have to do those mad numbers tbh, but I guess that choice depends on your personal situation. Aiming to get Hau in oktober myself, and I think that’ll be tough enough with elite…