As you mentioned before there will be new maps that are good for PADK or Spear DK in the future, but do you know which one will be released earlier? Who knows, that is why a Hybrid is PREPARED for the future. You keep on saying that a HYBRID is EXPENSIVE, but the reality is that it is not that expansive if you get a red surfboard at 9x for hime. We can only look at the maps that we have right now, goby used to be the best map to train on for a Hybrid, now it is hime, in the future it may be something else. A little bit more money for a lot more of flexibility on the best training maps is worth it IMO.
Godshoot... what I get from your post, is that you think up to LV100, spear is best, and after LV100 you use polearm at Himes, right? So like I said, it seems polearm is ONLY better at Himes. To be honest, by the time most people get to LV100+, there will most probably be more maps to train on.