NO CONDITIONS = LESS RISK FOR THE SELLER
To win a bidding war, you need to do what you can to reduce the Seller's risk is choosing your offer, and that usually means not including conditions in your offer that are to the detriment of the Seller. Conditions are terms of the offer to protect the Buyer - for example, financing or home inspection.
To win a bidding war, you'll need to get your financing in order and your home inspection done BEFORE the offer vs including it as a condition of the offer. That way, you've done your due diligence to protect yourself, but you're also letting the Seller know that you're serious and won't change your mind tomorrow.
An offer without conditions is called a FIRM offer, and that's what Sellers are looking for in a bidding war. They want 100% certainty that you won't change your mind in the morning or want to re-negotiate the price.