Runes of Magic US / AU

hello again
i got lots of help here to figure out how to raise my gathering skills past lvl 20
(i found the npcs at east varanas with advice in another thread...)

now, i need to raise the crafting skills past lvl 20 (my carpentry isnt going up now)
ive also got tailoring and alchemy at 19, carpentry is sitting at 20 now
armor making is at 5

i went back to those npcs at east varanas, but they didnt seem to have the +20 option there
carpentry instructor at the woodcutting station in varanas doesnt offer it either
so, any help on where i go to find the npcs for each crafting skill raise?
the community here in the forums has been very helpful all along, and i thank you again in advance
as always...

PS... i know that nuggets are made from sand, so are ingots made from nuggets then?

i have some very nice blue recipes

ok thanks Murk, good info that i had forgotten about how many i can raise
so, is it a quest at the npcs in east varanas??
same ones i got the gathering skills past 20??

or, does this mean 3 skills in total between gathering AND crafting?
like, can i only be above 20 in, say, carpentry woodcutting and maybe herbalism??
does this mean its a combination of crafting AND gathering?

cuz i need, say, metal and wood to craft carpentry items
so then i would need carpentry, woodcutting and mining...
but if i want to tailor, i need tailoring, herb gathering and wood gathering.
uh oh... cant do two craft skills at once and still gather my own materials??