so after playing on PO's monotype server (drizzle/drought/hippo are banned, as well as the obvious ubers), i've had the most success w/ monobug, as it is the best equipped to handle any other team. the thing to remember is, it's not about covering your weaknesses but winning the match.
as i've retired my bug team already, lemme give you an example..
lead: genesect @ scarf
252 satk, 252 spd, timid
download
- u-turn
- ice beam
- flamethrower
- thunderbolt
when your opponent's team is guaranteed to share one type, this guy makes an excellent lead AND late gate sweeper. if you're stuck with an atk boost instead, u-turn away and come back later. between ice fire and electric, you should be able to destroy all but one or two pokes on your opponent's team
volbeat @ focus sash
252 spd, 252 DF, 6 w/e, jolly
prankster
- tail glow
- baton pass
- encore
- rain dance
this guy is the crux of the team. it is possible to win without setting up, but if this thing gets to pass it's usually gg. i'm sure i don't need to tell you how good priority encore or tail glow passing is. rain dance is to fuck with tyranitar (not banned only because rock types don't get sand rush / sand veil) and abomasnow. mono ice teams usually quit if i kill abomasnow and RD on them
yanmega @ expert belt
252 spd, 252 spatk, timid
speed boost
- protect
- bug buzz
- air slash
- HP ground (FUCK YOU HEATRAN)
tail glow recipient #2 (#1 was genesect, who usually steamrolls teams if they lack a resist to any of its moves). protect is to net speed boosts against scarfers and the like, and the other attacks net it the most useful coverage in the tier. even after eating SR damage this thing is a beast
volcarona @ chesto berry
252 spd, 252 spatk, timid
flame body
- quiver dance
- fiery dance
- bug buzz
- rest
tail glow recipient #3, but usually my last choice as it's not lightning fast like the others. this guy is probably the weakest link of the team, believe it or not. it still does well, and takes fire hits OK, but meh...
scizor @ metal plate
252 atk, 252 HP, adamant
technician
- bullet punch
- superpower
- swords dance
- bug bite
this guy is really only on the team to take out dragons and especially scarf terrakion, who would otherwise ravage the team. fake a choice band set as long as you can, and you can usually net a surprise kill
shuckle @ leftovers
252 HP, 252 spDF, bold
sturdy? lol
- stealth rocks
- toxic
- protect
- knock off
this guy mainly puts up the rocks and tanks fire attacks. try not to be stuck with him as your last poke, and you'll do fine. forretress would have been ideal, but I would have been too weak to fire moves
As you can see, i'm not too concerned about covering my weaknesses. Compare it to HO; you don't stock your team with pokes based on resists and defenses, because the point isn't to tank hits, it's to kill other pokes.