normally pentatonics and major scales wud be good enough for solos i reckon...its just the combination of minor scales in order to give u more variety i guess..im no king at scales but yeah this is what i reckon...my solos arent dandy too so i wudn recommend that much but yeah as all them wise folks have told and taught me so far... pentatonics and major scales will do u pretty good...justneed to look for the key and improvise with feel...(preferably with eyes closed cos itss way cooler)...or not..but u get the idea..perhaps someone more knowledgable can chip in this...

2 cents

:)