Try some Mods from Hexxit pack ;)
I play FTB Unleashed with:
Tree-Capitator-Mod-Forge-1.5.2
[1.5.2]bspkrsCorev2.09
backpack-1.12.13-1.5.2
BattleTowers_1.5.2
DimensionalDoors-1.5.2R1.4.1RC1-194
InfernalMobs_1.5.2
Meteors Mod V2.10.2
RottenFleshToLeather-1.5.1
Reliquary1.0.6d
Ruins_1.5.2...