+ 3 the tricky
+ 3 cyberdragon
the lv4 monsters are there for resonator engine, right? i'd use the space for something else. with most resonators being 3, normally the best play is to summon lv3 resonator along with a lv5 monster to synch 8.
for more options: level eater
for extra deck i recommend the tough ruler archfiend
since you're using red carpet, you could go for more than one nova:
you could use a junk synchron to recover a barrier and synch with them
if you take out the resonator engine you should take out the lv4 monsters as well
and maybe take out the darkworld gates, i find tuners in graveyard are useful with revival cards like call of the haunted for more synch's