Alching is a horrible way to train mage. If you have to, alch maple longbow (u)'s as they are made in bulk and you can buy them at 5% under, overnight.
Here are some other options you might wanna consider;
Superheating- Better experience that alching, some smithing experience too and you can also make a profit if you do steel bars.
Bursting rock lobs- Amazing experience, you get charms too so if you ever decide to train summoning, you will have enough charms banked. It can be profitable if you sell charms via lootshare to another account.
I havent used the lunar spellbook much so I cannon suggest any lunar spells
Gl getting 94 mage.