Use the following trick to get party SP very early. Just outside the Urd Falls 
Cave as you are moving toward the downed ship is a save point. To the east side 
of this save point are two bug encounters that are very close to one another. 
You will need these two monsters to create the ambushes you need to fill up your 
bonus board. First, save the game. Reload the data to clear your current bonus 
board. Next, draw the two bug encounters together, then initiate combat. As you 
fight these battles, do not fulfill any bonus conditions (do not defeat multiple 
enemies with one strike, end the battle on a critical hit, or down an enemy 
using only Special Arts). When the second battle in the ambush begins, you will 
gain one green bonus tile for the ambush. Win this fight, collect your reward, 
then enter the Urd Falls Cave. Turn around, and exit. Go back to the two bug 
encounters, and repeat this process thirteen more times. If you can manage to 
not gain any other bonus tiles, you will have a bonus board filled with green 
tiles, each granting 1 SP at the end of every battle (giving you a total bonus 
of 14 party SP for each victory). You may consider saving two slots at the top 
or bottom to fill with HP/MP regen tiles, but this is entirely optional. Then, 
simply wander around, fighting everything possible. The critical hit rate on all 
the monsters is extremely low, but you may wish to switch over to Reimi and 
avoid contact with the enemy all together. In about an hour, you will have in 
excess of 500 party SP. Your experience and Fol levels will be rising as well, 
making the coming Boss fight easier. You can spend the party SP to increase Edge 
and Reimi's skills and still have more than enough for Faize and Item Creation. 
If you are really dedicated, you can max out your current skills as well as the 
purchasable skills in the alien base after you defeat the Boss and return to the 
crash site, and still have a lot of party SP to use.
Use the following trick for easy SP, experience points, and Fol. At the start of 
Disc 2, you will reach a town called Tropp. Before you enter Tropp, you will see 
two Albero di Anima's next to each other to the right of the entrance. A battle 
with one of these two will almost always result in an ambush giving you a SPx1 
bonus on the bonus board. When the bonus board is filled, after every battle you 
will receive approximately 2,500 experience points, 2,000 Fol, and 14 SP. Then 
go back to Tropp, where the inn is very close, and exit to respawn the enemies. 
Repeat this as much as desired.