Cathedral of Aachen (CoA) is one of the three GBs that are part of the Fighting Trifecta. If you are a fighter in any sense of the word, this is an essential GB for you to have. It gives you an attack and defense bonus when you are attacking, which is important to being able to fight well, plus coins daily. Of the three GBs that are in the trifecta, this is the last one most will work to level up past 10. You can get this GB in EMA, and it should be one of the easier to obtain. Just getting it to level 10 will have a big impact on your ability to fight to at least PE, but beyond that you’ll want to take it higher. You definitely want to do Arc and Traz first.

Below is a table for taking CoA beyond level 10 with Power Arc Locks set at 1.9. You can use a Power Arc to lock your GB at any time there are FPs available as a reward, but this table specifically focuses on beyond level 10.

Getting to
CoA 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
11615133673491937710376N/AN/A
12631152763272934510354N/AN/A
13647162863232934110350N/AN/A
14663181953012932910338N/AN/A
15679190952992933610345N/AN/A
166962091052783830610324N/AN/A
177142281142583829610314N/AN/A
187322471242383828510303N/AN/A
197502571332364826410292N/AN/A
207692761432174825410282N/AN/A
217882951521984824510273N/AN/A
228073141621795721719236N/AN/A
238283331711625721019229N/AN/A
248483421711645722119240N/AN/A
258693611811475721319232N/AN/A
268913801901316718719216N/AN/A
279133992001156718019209N/AN/A
289364182091006717519204N/AN/A
29960437219867615219190N/AN/A
30984456228727614819186N/AN/A
311008475238587614319181N/AN/A
321033485247638612919177N/AN/A
331059504257518612619174N/AN/A
341086523266438612819176N/AN/A
35111354227629951052914210151
36114156128519951052914210151
3711695802959951042914110150
3811985993040105852913210141X
3912286183140105862913310142X
4012596373230105892913610145X
4112916563330114742913010139X
4213236843420114692912510134X
4313567033520114732912910138X
4413907223610124592912510134X
4514247413710124642913010139X
4614607603800124722913810147X
4714977793900133623811910137X
4815347983990133713812810146X
4915728174090133803813710155X
5016128364180143723813910157X
5116528554280143833815010168X
5216938844470152583813410152X
5317359034560152723814810166X
5417799224660152873816310181X
5518239414750162833816910187X
56186996048501621003818610204X
57191697949401621193820510223X
58196399850401621374820310231X
592012102651301711314820610234X
602063104552301711534822810256X
612114106453201811564824110269X
622167108354211811804826510293
632221111256101901684826210290X
6422771131570151901964829010318
6523341150580341902244831810346
6623921169589542002344833810366
6724521188599762002654836910397
6825131216608812002894839310421
69257612356181062093055740010437
70264012546271322093415743610473
71270612836461402193395744410481
72277413026561702193785748310520
73284313216652012194195752410561
74291413406752342284435755710594
75298713686842512284795759310630
76306213876942882285255763910676
77313814067033262385535767710714
78321714357223472385845770810745
79329714547323892476176773010777
80338014737414342476726778510832