rbing and supering items questions

rb'n soon and i have the following items i wnt to super

normal SDG ears +4
uni SDG nekky +4
elite SDG ring +4
uni SDG armor +4
elite SDG boots +4

after i rb i wna make them super. met first to make them low dura i was told then spam dbs in tc. any ideas to how many dbs this will take and if this is the best way to do it. also heard items w/plus r harder to up quality too :S

thnks in advance

well i had a norm. lvl 5(lowest lvl best chance to up)2soc club and blade,the club i used 7 dbs on and i couldent get it past unique but the blade i used 3 on and it elite(never failed.so i guess i'd say its luck and youll need 30+,in my opinion,but thats jst my opinion