The Ottomans have always had ups and downs ever since vanilla came out, they had some OP days when abus had 40 range, but later they were ripped off to rely on crates and trade routes, however, a new era for the Ottomans has begun...
THE SUBLIME PORTE
The Ottomans have always had a fragile economy because of auto-spawning settlers, in the last patch the well-known 'Silk Road rush' gave them economy, but now the viable option is the 'Sublime Porte' 
, this is an age 1 card that converts all of your food to 25% more wood. This card is sent as the second card of the game after [3 settlers] obviously and it sacrifices your first age 2 card time until later on, but for a very good economy. Here is a picture to illustrate my point ( this is in a game against the comp. just to show you ).
The cards:
Covered wagon - useful in age 3 to have a better eco 
Economic theory - nice card in age 1 to help with eco any time 
Factory - duh 
Food crates - only 700f 
2 Galleys - to take out the opponents water system very swiftly
GB - nice age 4 card 
Irregulars - rarely used card, only used in the 'Apache/Abus semi-FF' 
Janissary cards - both 5 jans in age 2 and 8 jans in age 3, very nice cards 
Jan combat - to make your already strong musketeers even stronger! 
Light artillery hp - VERY good card as there are hardly any Ottoman unit upgrades in age 2 
Palace Intrigue - a mosque is built in every Ottoman game, so it's a useful card mid-late game 
Refrigeration - more eco boost 
Rendering plant - good for a fish boom 
Robber Barons ( factory ) - duh once again 
Royal Mint - Nice eco boost 
Schooners - probably needed for a fish boom 
Team artillery hp - another age 2 upgrade 
Artillery attack - another age 2 upgrade 
Wood crates - 700w only 
Settlers - 3 obviously, 4 as well for more eco 
Cavalry combat - very nice age 3 upgrade 
Coin crates - 700c and 600c 
Spahi - There is just no Ottoman deck without these guys Sublime Porte - this guide is based on this card 
Mamelukes - Monsters that can reach 1667 hp with the Cavalry combat card..'nuff said 
Fish Market - useful for a fish boom 
2 falcs in age 3, good card
Now enough about the cards, now we get to the juicy bit - The strats:
Ottoman 2 TP Colonial warfare - Ottoman Apache/Abus semi-FF - Ottoman Janissary/Abus fishboom - Ottoman 3 hussar Cree/Janissary rush - Ottoman Huron/Janissary fishboom - Ottoman Jesuit/Abus fishboom - Ottoman mosque semi-FF - Ottoman Spahi semi-FF
Ok, the strats are gonna very vague, but it's late so i'll edit it later. =P
Standard discovery + Early colonial: 1st card 3 settlers. 4 to hunts, set waypoint to hunts, 2 to crates, i builds mosque, then research millet system and build a house, send another settler to start herding animals back to TC. Age-up with Quartermaster - UNLESS you are doing spahi semi-FF. 2nd card arrives 20-40 secs into colonial ( Sublime Porte ) by the time it arrives you'll have a minumum of 1200 food - practice for this. If you aged up with the Quartermaster, then send 2 vills to those crates and build your military building asap.
2 TP colonial - make 2 tradeposts, research stagecoach, build barracks and foundry and market - research hunting dogs and placer mines. You will have 475 wood left. Send 5 jans or 700c as 3rd card.
Apache/abus semi-FF - make Apache TP, research 'Apache cactus use', make foundry, make 2 TP's research stagecoach, TP's to coin, make apache + abus, keep apache alive, send 700c as 3rd card to age-up, when in fortress research 'raiders' and send Cav.comb and then [Irregulars]. u will have 500w left.
Jan-Abus fishboom - same as 2 TP colonial, just send schooners as 3rd card and instead of 700w on TPs and stagecoach, use it on two docks and 'abassid market' upgrade in mosque, use rest of your wood on fishing boats when schooners arrive. I usually send [2 Galleys] as 3rd card to kill him on the water.
3 hussar Cree/Jan rush - same as 2 TP colonial, just instead of 1225w on foundry, 2 TPs and stagecoach and market + upgrades, research abassid market, make TP, make 13 cree (1040w), send 3 hussars as 3rd card, research tanning, start coureur production after cree are made. 160w left.
Huron-Jan fishboom - build rax, build TP, make 10 huron (500w), make 2 docks, research 'huron fish wedding', research 'abassid market', 225w left, send schooners to start booming on water. I usually send [2 Galleys] as 3rd card to kill him on the water.
Jesuit-Abus fishboom, not a very strong boom - make foundry, dock, TP, 12 Jesuits (1020w), 130w left, send schoonersto start booming on water. Research 'smokeless powder' when u can (abus benefit GREATLY from this) - with this tech abus can have 58 attack in colonial (with artillery attack) that's 58 against other RI, and 87 against HI. I usually send [2 Galleys] as 3rd card to kill him on the water.
Mosque semi-FF, make some jans to defend if u need to, send mm if u need to, 3rd card 700c, 4th Palace Intrigue, make a barracks, 2 TPs + Stagecoach, set TPs to wood, have 1200 wood by the time u age up. Research Tufanci corps from mosque when u age up and send 2 falcs, then research veteran janissaries and start making them. the tufanci corps should arrive at 8 mins. Practice. (age up with exile prince).
Spahi semi-FF, make jans to defend if u need to, send mm if u need to, 3rd card 700c, age up with philosopher prince and then exile prince, make 2 TPs and stagecoach, build an outpost near your furthest hunts, make a barracks and research veteran janissaries, send 5 spahi once in fortress, they should arrive at 8 mins. practice. follow up with [2 falcs], [5 mams], [cav combat], [3 spahi], [8 jans]...
~NEW~ 3TC FF, standard early colonial, just send 700c as 3rd card, age-up with the exile prince, while aging send MM if you have to, make an outpost near your furthest hunts if u need to (also useful for exp), instead of building 2TPs and stagecoach, keep 600w for fortress, when in fortress, send [covered wagon] and build a TC with your explorer. Now your opponent will have to face a booming otto in fortress - not a good situation for him..=P
Sorry for so vague guides, but i really didn't have much time, after i finish editing this one, i'll hopefully post a Sioux one. Cheers fellow Otto players and GL :P.