Call few contract methods from another contract consistently

Yes.

The single call to your outer contract will send messages to your inner contracts in exactly the order you expect, every time. They will always execute in the same block because the whole thing is encapsulated in the single transaction to your outer contract, which must be mined in a single block.

Although there is a mining delay before the outer transaction is included in a block, the inner messages are part of it and their execution can be thought of as roughly instantanious.

Hope it helps.