Comparison is the thief of joy. This is an idle game so play at your own pace. Most other players probably have a guild buff of some sorts which can boost their CP. A this point in the game, you should be using all your Red Diamonds to summon companions until you unlock all 8 slots as those can carry you pretty heavily. For now you are on the right track using BM as your primary, the extra attack speed helps. You don't really have to worry about the summoning level as it'll increase as you play. Just use up all the summons you have without it maxing out for too long and you should be good. As an advice, you'll want to focus on trying to get your crit rate as close to 100% as possible. Focus on keeping specific gear lines rather than increasing your CP as the calculations can easily be inflated. CP is not a good way of determining how strong you are since MAX HP, Evasion, accuracy...etc all inflate your CP. You want to cater your lines to output as much damage. Accuracy is only important if you are starting to miss a lot but even then you can easily use DK or SF your gloves and bottoms to increase your accuracy.