I know ima get flamed for this by all the pr0s but w/e i have nothing to lose

can someone help me with the weapon upgrades? I only upgraded lightnigs blazefire saber to lvl 10 but that was back in like chapter 2 or w/e and havent touched the upgrade system since. Im on chapter 11 now and im having trouble fighting some of the mobs. I just beat vanilles eidolon or w/e took me a while and i keep getting raped by mobs like 60% of the time which is ridic.

Which weapons should i upgrade, where do i get them, etc? I tried looking at all the guides online but they all looked like foreign language to me and i have no clue where to get those weapons. Thx for any input :/ Also how long does it take to get the trapezehedron or w/e lol? If any pro wanna help me or discuss plz shout me a pm and we can talk on aim or w/e.

Im having a trouble pulling off a super if im facing to the right... and it seems like i have no problem pulling it off in trial mode. However in a real game i cant even pull it off online on either side... Ive had it for 2 days and played prolly 30+ games online (about 2 matches won) and spent at least 3 hrs on trial mode practicing movse but i still cant get it down. Should i be playing against computer instead of challenge mode or what. Thx for anyon that can help really appreciat it.