Arctic Orangery, or AO for short, is an Arctic Future GB that gives you a chance at a critical hit against enemies the same age as your attacking units, and FPs on collection daily. The beauty of AO is that its critical hit chance doesn’t have a certain number of attempts, so it will just keep on going. In addition, that critical hit could be used by your defense army when someone attacks your city, should they be using units that match the age(s) of what you have set up for defense. The higher the level of AO, the more likely it is for that critical hit to fire. The FPs are a nice bonus as well, averaging about 1 FP per level (similar to Cape).

This chart shows locks at 1.9. Only 1/2 will ever be safe for a clean lock, from levels 38-62.

Getting to
AO Level		Cost to
Level		First Place
Lock		Second Place
Lock		Self Donation
1/2 Lock		Third Place
Lock		Self Donation
1/2/3 Lock		Fourth Place
Lock		Self Donation
1/2/3/4 Lock		Fifth Place
Lock		Self Donation
1/2/3/4/5 Lock		Clean Lock
1/2
1111382471246443869110709N/AN/A
1211672761436154865210680N/AN/A
1311963041525884864410672N/AN/A
1412263231625805762719646N/AN/A
1512563611515345763019649N/AN/A
1612883902005086756419593N/AN/A
1713204182094846755919588N/AN/A
1813534472284597652619564N/AN/A
1913874752384377652219560N/AN/A
2014215042574138648819536N/AN/A
211457542276373954492948610495
221493570285353954482948510494
2315315993043331054182946510474
2415696373232951053992944610455
2516086653332781143822943810447
2616487033522421143652942110430
2716897323712251243382940410413
2817327603802121243442941010419
2917757983991791333123836910387
3018198364181471432793834610364
3118658654371351432773834410362
3219119034561051522483832410342
331959931466971522583833410352
342008969485701622303831610334
352058998504621712144828910317
3621101036523381712094828410312
3721631074542151811854827010298
382217111256101901644825810286X
392272114057001901824827610304X
402329117858902001624826610294X
412387121660802001634826710295X
422447125462702091485724310280X
432508128364602191415724610283X
442571132166502191475725210289X
452635135968402281365725010287X
462701139770302381255724910286X
472768143572202381355725910296X
482837147374102471296724210289X
492908151176002571236724610293X
502981154977902571396726210309X
513055157778902661576728910336X
523132161580802661776730910356X
533210165382702761786732010367X
543290170185502851647629719335X
553373172986502852097634219380X
563457176788402952167635919397X
573543180590303042277637919417X
583632184392203042597641119449X
593723189195003142547641619454X
603816192996903232728642319471X
613911196798803332908645119499X
6240092005100703333318649219540X
63410920431026233423568652619574
64421220811045503523828656219610
65431721191064793524308661019658
664425215710831113614639563419691
674536219511021463714979567819735
684649224211211653715449572519782
694765228011402053805859577519832
704884231811592483906279582719884
715006235611782943906929589219949
7251322394119734439974310593219999
73526024421226376409774105973191040
745391248012454314188301051038191105
755526251812644904189081051116191183
765664256512835344289601051178191245
7758062603130260043710271141236191312
7859512641132166943711151141324191400
7961002679134074244711871141406191482
8062522727136879845612451141473191549