Use all attacks (actually you do have only 3 anyway xD), on bot set that the bot should do Rec Div, Holy Spell, Noise, Mov March and Guard/Mana/Hit Tambour and all time Mana Cycle. Do at least your set to +3 and put some blues on it, your harp should be at least +4 if not even +5 since your damage is pretty low anyway. Bard/Cleric is botable, but you need to take care of your grinding spot (try finding places without pt mobs), or else you might lose lots of exp ..
And here is my suggestions where to bot:
76-79 on Roc Mt Lv 72 Eagles (Niya Snipers are awesome but mostly full with taxis)
79-81 on Takla Niya Hunters
If your set is good enough you could also go straight to Mages and stay there till 84
From 84 to 85 (even 86 if you wanna bleed those mobs out) on Wing Tribes at the Left Lower Peak .. easy to reach from Samarkand
85 to 87 Jg Cave B1 Lv 81 Crystal Mobs (dunno their name, but they do mag damage)
87-89 on those Lv 82 Mobs which do Physical Damage (well you could also go Antinokes, but they are pretty strong imo and their physical attack is inflicting some serious damage)
Till 90 you can go back to Jg Cave B1 again, on those 84 Mobs which look again like Crystals (also mag damage mobs)
After 90 you should be able to get back into parties, which i also would recommend..you lvl way faster and your char meant to be played in parties anyway
If you need any further assistance, feel free to ask