Technically you can have TH3-4. TH2 from /THF + Chaac Belt + Gourney Ring (if you want to give up your Adoulin ring for that, haha) gives you TH4. TH2 from /THF + Chaac Belt gives you TH3. TH1 from spells + Chaac Belt + Gourney Ring (again, why waste the ring slot?) = TH3. The option is there, it's just not a nice one. :P